Well i have just switched to a mac and have downloaded pocket mac and following a little bit of work it syncs my 8820 perfectly.

The one thing that i have found, (which meant that i had to do a little bit of extra work at the beginning), is that iCal does not like repeating events that have been created on my bb, i have deleted them on my bb and re-set them up oin iCall and it worksfine.

All my contacts (some 500 or so), have synched perfectly with address book from the first time.