Hi George! We (Keith and I) are going too – very excited!
I’ve never been either, but have been monitoring the feeds from http://2007.sxsw.com/community_blog/ and http://www.sxswbaby.com/. There’s a brief but informative guide at http://www.standardzilla.com/2007/02/21/sxsw-interactive-mini-survival-guide/
Will you be twittering while there?