There are two currently available: Magnavox H2160MW9 and Philips 3576, both very similar in design and features. They both have 160G HD drives along with a DVD writer.
Check Walmart (for one place) for availability.\
To answer the question, people are too stupid to realize that paying monthly for recorders like TIVO or cable costs more than buying the unit outright. Or too cheap. These will be the last of this product line in USA. Check avsforum for a huge post by "Wajo".