Ask YC: Biggest startup hubs

Research Triangle in North Carolina: http://www.rtp.org/main/

Seattle and NYC for sure - and judging from the Web Innovators Group having hundreds of attendees, Boston as well.

seattle, austin, nyc, & boston. i'm fairly sure this has been discussed in length in the past.

easy: silicon valley then boston, seattle, austin, and nyc

why do you ask?