Now that we're starting to open the floodgates to the masses, one thing that will likely become apparent is that there are some subtle user interface changes. For those of you that like to click the Windows Pearl (also known as the Start button), then click Search, you are in for a little surprise.
As you can see to in the screenshot at right, the Search menu item is missing in action. Why?
Well, for the gory details, you'll want to review the KB article at http://support.microsoft.com/default.aspx/kb/941946 and some of the developer documentation at http://msdn2.microsoft.com/en-us/library/bb776808.aspx.