I thought it was called the "Orb", That is assuming you stay in Aero mode.
Back in classic mode it looks just like the Start Menu to me.
But a Google seems to confirm, it's being called a pearl
http://blogs.msdn.com/robburke/archi...tart-menu.aspx
"joepercussion1" <> wrote in message
news:7E87C89A-5A6B-4674-BBF2-...
>A Microsoft Rep. that was in the development team that answered tech
>support calls during the Beta Testing for Vista mentioned to me that the so
>called "Start Button" is not called the start button in Vista. It is called
>the Pearl!
>
> Did anyone else know this?