SXSW in Austin is the place to be right now.
Here's a good description:
The South by Southwest festival in Austin, TX which combines music, film, and Interactive media has become a major destination for trends and social interaction. Sure, it’s a social technology conference, but it’s a music festival and an arts venue.

Can't be at #SXSW? Check out Pepsico's sponsored tweets:
http://www.pepsicozeitgeist.com/
Very very kewl!