I've always hated the way the BB switches off the radio when it gets near empty. But then I thought about it...

If the radio off means I can still get to my calendar, addressbook, etc for significantly longer, I'd rather forgo what might be only a few mins longer talk or email time. Without a phone OR a calendar to tell me where I should be, OR a phone book so I can call someone with another phone, I'd be REALLY stuffed...