"Currently, I'm using SageTV [www.sage.tv] It's a PC based DVR software package. With it, I can currently;

- Record two standard def stations, and a high def station at the same time while watching a fourth video of any type. (Obviously, this requires having two tuners and an HDTV tuner.)
- Record standard TV to MPEG-2, MPEG-1, or just about any other format. This makes it easier to make VCDs, DVDs, or just play the program back on a standard PC.
- Playback using Dscalar to deinterlace the video.
- Play DVDs
- Play DivX
- Record shows as favorites (just like season passes) or let SageTV record things based on my past viewing habits (much like tivo's suggestions only I don't have to bother with thumbs up and down buttons)
- Do all of the above with an integrated schedule, which is free. No need to pay a monthly fee.
- Play and manage my MP3 library (I think you can do ogg, ape, etc. with some tweaks to the config)
- Stream video and audio to another PC over my LAN.

I'm sure I'm missing much more. This thing does way more than any tivo, even a hacked tivo, and it's constantly being expanded. It surpasses TiVo and ReplyTV in every way. I've even found it to be more flexible than MythTV and Showstopper (though they do have a few benefits in some areas.) "

this is basically a homebased PC with open source software loaded on it.