AAustin: Short Term Renting in Austin
AirBnB.com - people put extra rooms or guest houses up for rent. My wife and I had a great experience with it when we'd do a weekend in town. The people on there from Austin are really into it.
AAustin: Do I need to rent a car for a week in Austin?
It really depends on your plans. Austin is a sprawled out city with lots to do in the burbs, but you can set it up where you never need more than a walk or bike. It sounds like you'll probably be hanging out within one or two neighborhoods (near 6th I'd imagine),...