Well, I now hav it. DVR is not as polished as say a 522 or 501, but works and records HD none the less :-)
Only bug so far is auto detection of resolution. Box can pass thru 1080i (or upconvert), 720P (upconvert as well), 480p and 480i (and do 4:3 or16:9). Probelm is that it doesn't work...