According to this thread on AVS forum, Comcast plans on beta testing their HD DVR with TiVo software next month! This could just be a rumor but it sounds legit since the Comcast TiVo deal has been in the open for quite some time now.
If anybody gets their hands on a Comcast TiVo DVR, I would love to hear about it. I’m not a Comcast user but, I’m sure there are a lot of people who would be interested in getting more information.
Thanks Mike!