TIVO HD
The US is moving to HDTV, slower than I thought, yet with the continued drop in the price of the LCD HDTVs the conversion is picking up speed. Those that have HD quality TV probably wonder how they got along without it. Almost all channels have an HD version of that channel, including the PBS channels. PBS KQED, in the bay area, has at least 4 HD channels that I know of. It makes sense for TIVO to be HD capable. Being able to control when and what you watch began with the VHS recorder, but by all reports has been surpassed by technology. Actually, TIVO has been around quite a while, and digital has it all over tape. In this version TIVO does HD, but at a resolution limit of 1080i, and further does not work with Direct TV. Below I have referred you to an article about HDTV resolutions. Read more about TIVO, including the FAQ linked on their TIVO HD web page.
See this about.com article explaining the display differences between 1980i and 1080p. It all comes down to a matter of personal tastes.
Toast 8
While this version is not new (Macworld best of show 2007), Toast has had the ability to convert video files to a DVD, with a menus, since Toast 5, much like iDVD in iLife. If the TIVO is connected to your network, Toast 8 has the ability to import TIVO data and make a DVD.