Sal,
I just received the BV8 and set it up in about 15 minutes with both the series 2 Tivo and Apple TV. Both the Tivo and the Apple TV are entirely controlled through the Beo4 remote. I have one issue with the Apple TV control via the Beo 4 as it "takes off" through lists and will not stop until you hit "go", so at the moment is it difficult to step through selections. Hopefully we can get this figured out (I might be doing something incorrectly).
The audio output of the BV8 is quite impressive considering it's size (I am listening to Nigel Kennedy playing Kreisler at the moment and the imaging is very good). I am looking forward to the BL3/BL2 set-up soon to arrive, in the meantime the internal system will more than suffice.
If Tivo did not change the codes for the HD box then you should be able to control it with the Beo4/Beo5 remote. If they did, hopefully B&O will update the PUCs and make them available. I expect to eventually go with the HD Tivo box but not until the braodcasts have been in HD for a while. The Apple TV will download HD content so that will be my source for the time being. Good luck, and I hope you can resolve your issue.
Seek simplicity and distrust it. Alfred North Whitehead