Notice the plural on curve. Yes I had one and took it back because the calender alerts didn't work. Guess what the calender alerts didn't work on the new one either. If I can get my money back I am moving to the treo 750 or the 8525.
And there is an OS update available to fix it. Check the sticky at the top of the 8300 forum for the latest OS update (Optus released) that fixes the calendar issues.