The Tivo thing seems to work but the player is stupid - if you have just downloaded say 8 minutes of an hour show and want to stream it (assuming the transfer is faster than real time) then it will only show 8 minutes. You can watch that, but no more than that. Very stupid software.
My son tells me this is not the behavior on the PC - you can stream and watch, assuming that you never catch up to the transfer.
Also, the export to iPod is very slow. You will be better off with the following flow:
1. Download the show.
2. Use Tivo Decoder to make it a .mpg
3. Use VisualHub to convert to be iPod compatible - much faster than Apple's conversion which Toast uses.