You may be in luck. I believe Vegas is picking up the Life is Beautiful Festival which should feature the types of bands that you would want to see. First installment is set for fall 2013 I think.
I'll look it up! Thanks.
I was on SXSW's website and I saw a picture of the Fabulous Las Vegas sign. It was for some kind of meeting about the festival. For about a minute, my hopes were up.