By now you know the fondness I have for the Google Maps mashup. Especially when it's one that promotes the bike paths in my own backyard. The WashCycle has now completed its map of the major bike paths in the Washington D.C. area. I guess I'd like to see the Fairfax Cross County Trail added as well, but hey...I'm not complaining. It's a living document isn't it?
Meanwhile Gwadzilla points us to Wayfaring a community based map exchange site.
And don't forget Bikely, the new Australian based (but most certainly international) bike route exchange site.
The roundup wouldn't be complete without reminding you of these great mountain bike specific mashups.
As a bonus mashup here's Bloc Party vs. The Streets (via Between Thought and Expression)