Microsoft design point is to co-mingle structured collaboration tools alongside social computing tools - it's unrealistic to think of social computing disconnected from collaborations strategies. Microsoft also thinks of the IT Pro. can "follow" tag - do a people search and locate all people associated with that tag. Colleagues.

No matter how hard Apple strives to make Microsoft look uncool, one fact remains: Microsoft owns the desktop. Microsoft has a sad history of bundling lame, half-baked applications into the operating system by default (Outlook Express) and then up-selling you with software that actually functions (proper Outlook). Fire up iMovie.