Census 2010 NJ by Moonshadow Mobile

Moonshadow Mobile have released a great Google Maps application to visualise the 2010 New Jersey census data.
This application visualizes some five million records. Using the application you can set filters, colors and generate heat maps. You can display census block lines, as well as County lines, Congressional, State House and State Senate districts. You can even zoom down to the census block level and download the actual census data for a block.
The Census Bureau will be releasing data for each state over the next five weeks and Moonshadow Mobile plan to publish Google Maps applications to visualise the data for a number of the states.
Chicago Tribune - 2010 Census: Illinois Population

This Google Map from The Chicago Tribune uses data from the 2010 census to show population changes in Illinois.
The heat map shows areas that have grown and shrunk in population in the last ten years. The map seems to show a general trend of population growing in the centre of Chicago but people moving out of the outer neighborhoods.
If you zoom in you can view the exact population change figures for each census tract.
DailyMotoRide

The creators of SundayMorningRides have launched a new website designed to showcase beautiful motorbike routes. The site uses Google Street View to provide a first-person experience of these great bike journeys.
Each day the site features a different route selected for its scenic qualities. Each route also includes an elevation profile and a Google Map. Detailed information, GPS file downloads and user testimonials for each route are provided via direct links to SundayMorningRides.
Sherubtse College Campus Map and Virtual Tour

Sherubtse College, in the Kingdom of Bhutan, has used the Google Maps Custom Street View feature to create a virtual tour of the college campus.
The map includes a number of connected 360 degree panoramas taken both inside and around the campus buildings. Using the internal links in the panoramas it is possible to take a virtual stroll around the campus, just as you would in Google Maps own Street View coverage.
The map itself includes a custom overlay of the college. It is possible to adjust the transparency of the custom overlay and to select to view the indoor or outdoor panoramas.
Other Custom Street View Maps
SpotCrime

UK crime data has been added to SpotCrime and MyLocalCrime. The UK recently launched a national crime map for England and Wales called Police.uk. This data is now available in SpotCrime and MyLocalCrime.
Using both services it is possible to search for a UK address and view the latest crime data for the location on a Google Map. The data for a searched location is also displayed beneath the map. It is possible to click on a map marker to click through to read further details about each recorded crime.
Christchurch 22 Feb 2011 Earthquake

This Google Map uses the Ushahidi map reporting system to record the latest news from Christchurch. The map shows closed roads, open hospitals, recovery centres and hazard zones.
Anyone can post a report to the map by sending an email to eqnzfeb@gmail.com, by sending a tweet with the hashtags '#christchurch', '#eqnz' or '#ChristchurchQuake' or by completing a short form.
Christchurch Quake Map

The Christchurch Quake Map allows you to play time-lapse visualisations of the 4,870 quakes and aftershocks that have struck in the Christchurch area since September 2010. It is also possible to view visualisations of the last seven days of quakes or the 47 that have hit today. The Google Maps plot earthquake data from GeoNet.
The animations show the epicentre of each shock and are colour-coded to show the depth of each quake and scaled to reflect the quake's strength.
Google Person Finder - Christchurch
Google have released a person finder application for today's Christchurch earthquake. Using the application it is possible to search for information or add information for someone who may have been affected by the earthquake.
Marine GeoGarage

GeoGarage Marine, the portal to international marine maps, has added 227 marine charts for the Netherlands.
GeoGarage uses Google Maps to display marine charts from around the world. The site currently provides marine chart overlays from NOAA (US), DHN (Brazil) and Linz (New Zealand). Marine GeoGarage's web interface also gives subscription members access to all private charts from the UKHO (UK), CHS (Canada), SHN (Argentina).
GeoGarage Marine is not only a seamless chart viewer, overlaying charts at different scales on aerial and satellite imagery from Google Maps, but also allows the user to plot waypoints and to prepare navigation routes. These can be saved and uploaded to GPS (in gpx format or directly to Garmin GPS via its Communicator web plugin).
RepresentMe

If you live in Ottawa, Canada then RepresentMe can help you find out who your elected representative is and what they've done lately.
When you enter your postcode RepresentMe will display your electoral ward on a Google Map and tell you who your Member of Parliament, Member of Provincial Parliament and City Councillor are.
RepresentMe also displays the recent activity of your elected representatives, including their recent voting record and mentions in press articles.
Rain Alarm

This Google Map based application will send you a warning when rain is approaching.
Rain Alarm displays an animation of current precipitation and can warn you against approaching rain or snow. The app checks a perimeter of 75 km around your selected location every 30 minutes. If rain is approaching your location the map will then sound the alarm.
The app is currently available for the USA, Canada, Australia, the UK, Ireland, Norway, Germany, the Netherlands and Spain including the Balearic and the Canary Islands.
Crazy Boat: The Curse of the Trash Vortex

The Pacific Trash Vortex has reached critical mass, flooding nearby seas with strange and valuable debris. A new age of sea entrepreneurship has arisen. Can you man your rusty old boat and save the Pacific Ocean from the floating debris of the Trash Vortex ...?
I've been waiting a while for someone to come up with an interesting use of theGoogle Static Maps API Styled Maps feature. It was definitely worth the wait. This Facebook game makes great use of the Google Static Maps Styled Maps feature and HTML overlays with real latitudes/longitudes to create a realistic backdrop for your challenge to clear the Pacific Ocean of the Trash Vortex.
Echo Team has called upon some of the greatest mid-century American action serials to make a game that both harkens back to the adventures of yore and puts a new face on the idea of exploration, with an emphasis on the environmental impact of what reckless exploration means to the planet at large.
Crazy Boat uses your Facebook profile data to give you in-game bonuses for your real-world skills and strengths. If you you post messages about the game to your Facebook wall, you might earn the Forest Ranger skill, and if you post about current events, you might score points as a Politician.
5% of the in-game revenues go to benefit Project Kaisei, a non-profit organisation dedicated to cleaning up the real Pacific Trash Vortex.
So, are you up for the challenge?