Via Tivoblog, it looks like the JavaHMO 2.0 is starting to firm up. They just released Beta 3.0 with a lot of bug fixes included.

JavaHMO is a free replacement for Tivo’s Home Media Option, which is part of the OS for Series 2 Tivos. It adds a ton of features to your Tivo including internet info like the local weather, internet radio steaming, and the like.