May have been posted before, but had a quick search and couldn't see it:

ITV HD on Sky HD

Not a right lot broadcast in HD yet, but when it is, like for the footy, it used to be annoying that the cable lot got it and we didn't......... but now no longer!!!

 

It's been around for ages, one drawback is that you can't channel flick during the adverts as you have to come out of the channel.

 

And you can't record it.