Gabe, here are a few others located outside of Silicon Valley. I hope that other people will contribute to this list as well!
Magillem - Paris, France (IPO in late 2009 was the most under-reported story in EDA!)
Space Codesign - Montreal, Quebec, Canada (ESL spin-out from Ecole Polytechnique, U de Montreal)
Binachip - Deerfield (Chicago), Illinois (the other start-up by Prith Banerjee, now head of HP Labs, while a professor at Northwestern University)
PDTi - Vancouver, BC, Canada (SystemRDL, etc. by Jeremy Ralph, ex-Intel Canada)
Agnisys - Delhi, India (CEO Anupam will be at DAC)
Please add to this list ... thanks! :)