Presale tickets now available if you are on the mailing list, general public tickets I think go on sale Thursday.
http://circuitoftheamericas.com/media-center/
I sat in Turn 1 last year. I liked it but I plan on giving the seats in Turn 15 a try this year... Might be able to see all the way down to T11 and then through T16...
House is open for my everybody in the SBA family