Keeping my own post going with things I've recently found
http://www.ultimatecarpage.com - Just as it says...
http://www.neighboroo.com/ - Anything and everything you wanted to know about your neighborhood
http://color.slightlyblue.com/ - Flickr color selector - pull images with like colors. Pretty cool, actually...
Thanks to everyone that's posted... I have a few new favorites now! Lets keep em going!