I use Cyrus at home to archive all of my email because Cyrus blows the holy hell out of Exchange, Notes, or any other email server out there.

I have a BlackBerry on a BES also. I can honestly say that if I were living in some Microsoft fantasy land, it would be the best way to do it, but since I'm thankfully working and living in the real world, I have had to do things a little differently than leave the blinders on.