My pleasure. Any round of the NCAA Tournament is really fun to go to and I recommend it to any sports fan. It's surreal watching an arena get behind a double-digit seed still in the game in the second half.
I recommend tracking the arena's box office, like subscribing to their e-mail list or event alerts. Tickets for the schools are a different beast handled by the schools themselves. Usually the sections across from the benches and behind the benches are reserved for the participating schools, and some of the center court seats will be grabbed by the NCAA for VIPs and such, but the general admission will be handled by the arenas.