ByronM - 3:04 am on Mar 1, 2012 (gmt 0)
First, you don't need a Windows live ID, the Windows live ID just lets you have cloud/roaming profiles which if you ask me, is pure awesome. Actually, I think its just Windows ID now.
You can interact with live enabled services easily - from zune to xbox live to facebook.. the integration into SkyDrive is so easy now as well, it just works. Its seemless.
As far as corporations go, when you deploy in a corporate environment it will simply use Active directory authentication and your profile will be stored on the AD servers. The Windows ID can be controlled via GPO