They're also all over Texas, from what I understand. Also, Texas is a surprisingly Teched up state...
Yes, Texas is not just oil, cowboys and cattle. Matt Mullenweg, founder of Word Press, was born and raised in Houston. He is in San Francisco now, but Houston was home until 2+ years ago.
Dell Computer (pardon me Apple fans) is located just outside Austin. (I know Dell is having market share problems currently, but that doesn't mean the technology isn't still there.)
The South by Southwest convention in Austin is tech heaven for one week a year, having started as a music and movie forum.
Texas Instruments, developer of the TI 83, the magical (When I was a kid, I used a sliderule and graphed problems manually.) graphing calculator which every high school kid is now required to have for Algebra and higher math, is located just outside Houston.
Remember, the first syllable in "Texas" is "Tech".
Wahoo!