I know Google, Facebook, Apple, and others have been visibly increasing their presence in Austin. Apple was putting up offices across the street from my old apartment complex, and the scuttlebutt was they were adding 4,000-some-odd-employees here over the next few years.
Google has an office here in Austin, but it's mostly for sales and marketing. Apple's campus is going to be for sales and customer support, not product development.
What parts of Austin are those big companies located in? (When I left Austin in 2007 Google had just announced an office, which they closed a couple years later.)