I bought the 8WD HDMI Transmitter/Receiver
kit for my parents for Christmas. I just got around to getting it installed at their house (was waiting for Comcast issues to be solved.
In short, it's working as advertised. It was a snap to set up and it just worked. Here's their set up:
Tivo Premier ->
8WD Transmitter ->
8WD Receiver -> Samsung HDTV
The transmitter and receiver are about 15' apart and on different floors of the house.
The Tivo works perfectly on either TV, which means they didn't need a new box to drive the remote TV. The IR solution that comes with the 8WD works fine too, although I sort of wish the receiver had a built in IR receiver (instead of the plug in version it comes with). But it works fine and for some this might be a better solution (if say you want to tuck the receiver out of sight).
One last note, Amazon doesn't seem to have the 8WD anymore. However, they do have the Brite-View which seems like the same exact product.