I would have to disagree with the Philly bashing here. If you think all we have are cheesesteaks you are grossly misinformed.
Philadelphia has a long history of being at the forefront of the technology curve. It was the birthplace of the first commercial computer in the US. It was home to Commodore Business Machines. If you owned a PC in the 90s there was a great chance it had an ENSONIQ sound card in it. If you take out your iPhone and make a phone call its powered by Interdigital technology. Odds are your digital TV is using a set top box made by Motorola. And like it or not your broadband and cable are powered by Comcast.
If you are really interested in seeing what other companies are in the Philadelphia area check out http://www.phillytechhq.com.
The high tech community is alive and well in Philadelphia