And while I didn't actually make this purchase, my new job bought me a Blackberry Torch with a full data plan.
Welcome to the modern workplace's version of a permanently-shackled ball & chain. If you've never had a job that provides you with a cellphone before, my strong advice is to turn it off the instant you go off-duty (unless you have a clear cast-iron contractual obligation to be contactable) and never ever check work email or phone messages until you turn it on again at the start of the next working day.
Use a personal phone out of hours, and never ever reveal that number to anyone at work.
Oh, that's definitely the plan...although, really, I'd like to find a way to switch the phone numbers between the two phones. The one work bought me is way better than my personal phone!