I tried Zillow, Community Walk and Picnik. The kids at my school love Picnik after they shoot photos. I think some of these 2.0 award winners are fun, I did find one with a broken link to it's education features(dotdocstoc). Not very useful if you can't there from here. It's nice to see what is out there. I'm already using some of the winners daily, Picasa, IGoogle, etc.
I liked Community Walk - it would prove useful in creating evacuation plans, safe walks to school or field trip routes for a school. It was easy to use and the maps were from Google so they were familiar. I just wish they showed neighborhood trails too. I did map out a walk to school for myself. I had some trouble undoing things, I need and edit/ undo button for correcting misplaced path markers.
Picnik was a fun tool to play with photos. It would make it fun to label my Birthday Book Club photos next year. I make a bulliten board for the school showing all the members of the club. I could put their names on the photos easily.