Not Far Away - Exchange 2007 is coming
There is still time to get skilled up on Exchange 2007.
There is plenty of Exchange 2007 previews here
Also if you really want to get into the nuts and bolts of Exchange 2007
Check out the TechCenter. There is a wealth of training out, never have I seen so much information to get you ready prior to the shipping of the product. So take advantage of it and go learn.