This is kinda cool -- enter an IP address and it gives you a Google map showing where it's located. It doesn't appear to be street-level accurate (it's a few thousand feet off for FQ's location), but still pretty cool:
http://www.ip-adress.com
(note the missing "d" in address)
Only unusual one I've found so far is that all of AOL's brands--even Netscape--appear in a cornfield in Kansas(?!)