I figured since I was looking things up, I'd share what I found:
City Events:
http://austin.about.com/od/eventsandactivities/tp/July-4-Events-Around-Austin.htm
A pretty comprehensive list of activities:
More grown-up-ish and/ or random:
http://events.austin360.com/search?holiday=independence_day&st=event
Awesome foodie list:
http://www.ginnysaustin.com/?p=1420
Please feel free to share anything else going on!
Re: July 4 Events Lists