I purchased my Home Networking Package for $99 last night, and I am currently using iTiVo (to download from my TiVo) and
pyTiVoX (with Streambaby, to stream to the TiVo). I also installed TiVo Desktop for Mac (TiVo's own app) which streams music from iTunes and photos from iPhoto.
It's fantastic! It just works - using Bonjour networking.
The only disappointment is that TiVo Desktop for Mac only streams MP3 music. AAC does not work (even non-DRM'd AAC).
Get in quickly and purchase it for $99 before 1 April. I still think $99 is too expensive, but it's much better than the $199 it was first listed for.