Here's a thought, just thinking out loud here. My girlfriend has a Treo
and I the 8830 BIS Sprint. I sync with Gcal using ************* and she sync as well so we are both kept up today with it set to sync every three hours.
So, I am thinking you could import your calendar to Gcal and have both of you sync to that...............I don't see why it shouldn't work. But I don't have BES to test it with. Anyone else want to chime in?