Yup. I'm back at work, and one of the first things I saw in my inbox was that Mix registrations are now open.
Again - this year, the event will be held in Las Vegas from April 30th to May 2nd, at the Venetian Hotel in Las Vegas. More information can be found at the official MIX site at visitmix.com.
The price of MIX is $1195 USD, but if you register before March 15th you will get a special discounted price of $995. Register today and save over 15%!
Its extremely unlikely that I'll be there (alas) but if you are interested in what will be happening over the next 12-18 months in the Microsoft Web Dev space you should get along.