Well, having (stupidly) missed the last couple of years' Mix's, this time I've decided to finally go. And Las Vegas is a place I've been wanting to visit but never been able to do so ever since my first trip to the US about 10 years back. If you're a developer, designer or anyone who has anything to do with creating content for the Web - this is the event to go to.
You can register and view the agenda of the sessions over at the Official Site. There are a bunch of cool stuff going over there as well. There is a great 20% discount currently on as well so get it while it lasts.