As my 2 year contract on Telus had expired, today I purchased a new Blackberry Curve on a 2 year plan.
The first problem I had was with the calendar. It would not show upcoming appointments using the Today Theme. I was reading that some others were having this problem yet the fix was simple.
Options->Advanced Options->Default Services->Change the calendar to your default calendar user.
This solved my problems very quickly and easily.
Day 1: I love my Blackberry. Should have gotten it sooner.