What days are you going to be here? This Saturday there is a stunt riding show (throughout the day) at the BMW dealer. The Saturday after Thanksgiving is the monthly Pie Run by the Two Wheeled Texans to Hutto (just NE of Austin) and is a good opportunity to meet and hang out with riders. http://www.twtex.com/forums/showthread.php?t=78971
I'm supposed to be laying wood floor with my extra time off for Thanksgiving, but will definitely make the Pie Run. We usually will add some miles on either side of the ride.
Anyway, if you PM me a regular email address I can send you a gpx file with some potential routes on fun roads.
Have you found a place to rent a bike yet?