They have been airing commercials here in Austin on TV for the track and showing progress. Also good information like, supplied Austin with 1,000 jobs for the track and supposed to bring in something like $250MM per year. Not to mention all the venues held there other than just car racing.
This is actually a REALLY GOOD video that shows alot about F1 in Austin -
YouTube - ‪Circuit of the Americas Teaser Trailer‬‏