I've been looking at getting the
products/hdhomerun - Silicondust for a while. Downside is no CableCard support - Clear QAM cable channels only. Upside is no nasty encryption / broadcast flag / etc. etc. Also it works with / drivers are available for virtually every operating system.
Basically, due to the onerous copyright restrictions imposed on the cable industry by content providers, they are unwilling to let a CableCard be used in a product that is in any way open to the user, to move recordings around at will, to write their own software for recording programs, and so on.
I am a member of the EFF (Electronic Frontier Foundation), and I recommend anyone else interested in digital rights should check it out.
EFF: The Corruptibles - an animation that shows the future we could be headed for if the large media companies are allowed to write our copyright laws.