Floxx
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UK start-up Floxx is using Google Maps to map hot people seen by users. Rumours say that a number of UK universities are trying to ban it from their campuses.
Bonne Annee 2011
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Digitas France use Custom Street View Panoramas to create their own interactive Street View New Year's Eve card.
BOOMsys
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BOOMsys has an interesting calendar UI for its Google Maps animation of IED's in Iraq.
Google Shared Spaces
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The most retweeted post on Google Maps Mania this week was a small round-up of Google Maps available in Google Shared Spaces. TravelWithMe, a collaborative trip planning map, is probably the most impressive.
PlantMaps
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This Google Map displays the current USDA plant zone hardiness zones. Hardiness zones are helpful in deciding which trees and plants will survive in a particular area.