[sabato]

I did a search and all that I could find is BBsync, but I remember seeing another vendor that was less expensive ($5 per month I think).

[sabato]

found it - thinkpost.net ...also there is astrasync.com....and bbsync.com

[damaguk]

You can wirelessly synch your e-mail, calendar and contacts using BlackBerry Professional Software (BPS). Fits between BIS and BES. First license is free; others are $100 per person thereafter. check it out at:
na.blackberry.com/eng/services/professional