Comment A few more points... (Score 1) 500
If I may be so bold to link it, I wrote a similarly themed article a few weeks ago: http://babygotmac.com/a/133
My points were along the lines of adding collab tools that could augment/replace Exchange/Sharepoint, and offer everything through an easily managed appliance.
Additionally, adding online Backup and iSync to a corporate server would kick ungodly amounts of ass.
I look forward to the day when I have easily licensed, easily managed tools at my disposal to implement throughout my multiplatform organization...