What are some good/cheap hotels in austin, tx?

I am going to Austin City Limits this year and i need to find a good hotel that i can get for around $100 a night. It would be great if it was downtown austin as well.

This is where I stay:

Wellesley Inn Suites Town Lake
1001 South I-35
Austin, TX 78741
Toll-free: (800) 469-6130

Not fancy, but cheap and very close to downtown.

I can't really give you a hotel name, but from experience working in a hotel around ACL time, make your reservations early! A lot of the hotels, especially in downtown, book very fast by bands, recording people and tourists. Even hotels in North Austin are sold out during that time.