I looked iinto it a few months back myself and started this thread:
When I contacted BEV no one there really seemed to know much about the service. I ended up going with Roger's as I wanted HD and I was able to figure out that BEV didn't offer HD. I am actually quite impressed with the service and I am hooked on my 8300HD PVR. I wouldn't switch away from Roger's unless BEV came out with an a similar PVR.
If you'd like, a BEV rep is scheduled to be in my building this coming Thursday. If you's like, I can pose your questions to him / her and see what the response is. Don't hold your breath though - most of these people just want to sell the service and actually have very little product knowledge. Let me know if ya want to hit this person up with your questions.