The Microsoft Management Summit has, over the last couple of years, been possibly the single best source of advanced information on upcoming MS technology - more focused and more detailed than Teched. It does add the hardship factor by being located in Las Vegas.

If you are interested in management, operations, virtualisation or security it's well worth a look at the tracklist, and until Feb 14th there's a early bird discount.

http://www.mms-2011.com/default.aspx