I just noticed today that on my Comcast DVR box, when you go to the My DVR menu, there is a little Microsoft TV logo up in the right top corner of the screen. I think this is new, because I had heard that they had done no Microsoft branding on the box when it was launched. I had never noticed it before.
It makes me wonder if Microsoft was playing cautious when they released this new hardware/software. Theoretically, if Comcast had rolled out the new box and there were problems, Microsoft didn't want their name dragged down because of technical problems which may or may not have been related to Microsoft code. However, now that several weeks have passed and things are a rousing success, Microsoft wants to get the appropriate level of glory, hence the logo prominently displayed.
If that's not the dynamic going on behind the scenes, it should be!
Just a thought...