Amazingly, all of the Mix sessions will be available online, absolutely free. What follows is, in my personal opinion, the core presentations on Silverlight 2 that are currently posted. More are on the way but these three will get you started, (along with the videos and tutorials already posted.)
The Core Silverlight 2 Sessions posted so far…
- Building Rich Internet Applications
- Building Rich Internet Applications Part 2
- Data and Web Services in Silverlight
- Creating Rich UI Controls