Today is MIX07 start day: if you are like me, and you are not lucky enough to live in the US (or to have your company pay for you the trip to Las Vegas) here is the visit MIX from Home blog. It should be a continuously updated report of what is going at the MIX.
What are they going to announce at MIX?
Here are some speculations:
Expression Blend Express, Zune phone, Office and Visual Studio will be in .NET
A dynamic language runtime, Silverlight for Linux, Silverlight with a micro-CLR