My personal favorite site happens to be this quaint little place called Sycamoreland...the guy who created it is a genius. ;-)
http://syc75.tripod.com
Some of my other faves include:
Google--http://www.google.com
Ballparks (details of stadiums for all types of sports)--
http://www.ballparks.com
St. Louis Post-Dispatch (because I miss home sometimes)--
http://www.postnet.com
WebGFX: a great place to make your own web designs--
http://www.webgfx.ch
Kurumi: For road-tripping folks who enjoy pointless detail about the Interstate system--http://www.kurumi.com
Poetry.com: Allows you to post your poetry (and even publishes it at times)--http://www.poetry.com
and of course,
http://www.philly.com
That's probably more than anyone wanted...hehe