I just got my BB. After syncing with the calendar, performance slowed dramatically. I knew it would slow some because of the number of entries, but this is worse than on my Treo 700p.
I have kept my calendar on Outlook since 2002. It has a huge number of entries, but I need to refer to it from time to time.
Would it help (is it possible) to synchronize and only show only the last year and forward calendar on the BB?