Hi there!
I can't say that I've had direct experience but am about to have to do this same thing for one of my clients. I've been googling around the net and there's quite a few articles that seem to have the answer. I haven't tried them yet so I can't guarantee any of them!
Here's some links though:
An article by Daniel Petri - this has been recommend by several parties
Some postings of PDAphonehome.comGood luck and let us know how you get on
