Oh, nm, I found it deep in their FAQ. Philadelphia? Yikes! (Not saying anything bad about Philadelphia, but it's not exactly known as a startup hub. You really do want to minimize the odds against you in a startup situation.)
Philly is one of the largest startup hubs in the world for bio-tech and life sciences. Philly might not be known for its tech scene as much, or very early stage investing, so DreamIt has been a big step for the ecosystem here. Philosophy on investing seems different than what I see in Silicon Valley and NYC.
There is money here: Entrepreneur Magazine's VC 100 in August 2008 listed Ben Franklin Technology Partners of Southeastern PA as tied for 3rd in the country as far as #deals done. Josh Kopelman and Chris Fralic from First Round Capital are here too.
There is community here: Phillystartupleaders.org is a group of 250+ mostly tech entrepreneurs and VCs that meet monthly for a happy hour event. Indyhall.org is one of the most successful coworking spaces out there. IgnitePhilly was a huge success, with another one planned in the next couple of weeks. phillytechhq.com is a blog aggregator of all the tech companies here (big + small). The "user group" community is pretty huge too: http://phillygroups.org/community/GroupDirectory
There are alot of universities that provide access to talent: Drexel, Penn/Wharton, Temple/Fox, etc.
Philly also has an awesome combination of art and American history that make it a wonderful place to live. I hope this clears up some perceptions about Philly!