I've got my email and calendar syncing with my Exchange server every couple of hours, but if I make a change to an appointment from my PC and want to sync my Hero calendar immediately, how do I force an immediate update?

I can refresh my email, but I can't see a calendar refresh option?

I worked it out.

Just go to home screen, menu, Settings, Data synchronization, Exchange ActiveSync and there's a Sync now button at the bottom of the screen that syncs mail, contacts and calendar when you click it.

Perfect. Would be nice if it was a little easier to get to though!