I'm also in Austin and have been hanging out at Center61 (http://www.center61.com/ http://www.center61.com/). It's a pretty nice space for social entrepreneurs.

I'm also in Austin and have been hanging out at Center61 (http://www.center61.com/ http://www.center61.com/). It's a pretty nice space for social entrepreneurs. Their definition of social entrepreneur is flexible and I bet your open source work would qualify. At $25/mon it's pretty affordable too.