I've been jonesing to be able to listen to Sirius and especially Howard Stern while I'm at work. I wanted to test out data usage by using PDANet to stream Howard on my laptop. I didn't pay attention to the clock, but I'm sure it was streaming for at least 2-3 hours. Checked my account today and the data usage jumped by 156 MB in 24 hours. So, bear that in mind if you're thinking of tethering for streaming audio. Consistent usage like that could possibly tip off VZ that something fishy is going on.