Hey Frank!!
I'm a regular over at the TivoCommunity!! Come on over...
Comment to your questions relative to TiVo (one of my favorite toys):
1. Streaming and sharing of VIDEO to/from TiVo is only enabled between 2 or more Tivo's via ethernet in your home. You will need to also buy the Home Media Option (HMO). Note that you can use MEDIA CENTER to broadcast music to your TiVo from your PC...and play on your Home Theater System (very nice option!). -> I can see all my MC9.1 playlists on my TV in my living room...very cool!!
2. You can do a video capture using the video output from TiVo, but not a good option IMO.
3. You can explore other "video extraction" techniques...but these are frowned upon at the TiVoCommunity; you will not get much help there on this topic (other sites do exist
). You will probably want to stay away from Series2 (newest) machines and the kernel is locked down tight. Series I boxes allow more convenient access to the popular hacks...