Chris,
When it works it works very well. When it fails, it fails ( network
bandwidth issues ), the user experience is frustrating. My TiVo is
connected to my network wirelessly (802.11g) and when the network is
being used by others in the home the TiVo stops frequently to buffer
content. I have not had good results with HD content. My wife gave
up on watching past seasons of 30 Rock and is getting the DVDs from
Netflix. I think what is required to make this truly viable is high
speed broadband and the computer and TiVo must be connected to your
home network via wired Ethernet.