Thanks for the link. I bought a Series1 TiVo in 2000 and have had a Series3 (the predecessor to the TiVo HD) for a year and a half. I guess it will come as no surprise, I think the news that Amazon Unbox for TiVo will be adding HD content is exciting, indeed.
Although I bought my Apple TV in order to rent HD movies from Apple it has actually provided most of its utility for me through its ability to accept MP4 files. I have been using Handbrake to rip my movie DVDs and convert them to MP4 format, which I then sync to my Apple TV. The Apple TVs user interface is exponentially superior to that of my old Momitsu upconverting DVD player. I really like it.
I have collected so many MP4 movies and Time Machine backup files on my 250 GB FireWire drive that Im down to my last 14 gig of space on it. That problem encouraged me to order a 1 TB Time Machine today so that I should have plenty of storage space for the foreseeable future.
By the way, I think its unlikely that any cable modem user would have a bandwidth problem where downloading Amazon Unbox HD is concerned. My high speed Internet connection, which I have via Cox OKC, has handled all my HD downloads from Apple flawlessly.