Just a brief reply to Mike about Jazz Fest; obviously, this is off-topic from Austin.
A 1-day Jazz Fest ticket is good for all concerts on the grounds for that 1 day, with no in-and-out. There are about 10 stages, each operating concurrently from about 11 AM to 7 PM. The detailed schedules, known as cubes, for performers and stages, are usually announced in mid-April. The highlighted feature performers, such as Lucinda, generally have a 90-minute slot, somewhere between 3:30 and 7 PM.
Full official details on http://www.nojazzfest.com
There is also a very useful non-official site: http://www.swagland.com/jazzfest
The swagland site contains a treasure of data about past and current Jazzfests, plus scheduling grids for New Orleans clubs having night events during the Jazz Fest period. Be sure to probe all the swagland tabs for info on travel, food, past attendance numbers, etc.