Can I eat for free for a week in Austin, Texas?

I'm sure I've kept my South By Southwest Music Festival food budget under $50 for each of the five years I've gone, but in light of how the worsening economy has adversely affected my finances and the fact that I enjoy a challenge, I think I'm going to attempt to spend absolutely no money on food this year.
I think I've been invited to enough free food daytime parties to do it. I just have to beware of those late night, I've had at least 16 drinks, now I want a pizza slice urges.
Wish me luck.