Just thought I's post an update here to say that my experience with www.youtube.com/4od is that it doesn't play very smoothly at all and is as unwatchable as iPlayer.

The rest of youtube, as shown before, works fine. Even the advert at the start of the 4OD content (tried a couple of peep show eps) played fine, the audio plays fine too but the video plays at about 2fps!!

Guessing that they use a higher bit rate than standard youtube vids.

Slightly, off-topic, but when we get flash 10.1 (that I am to understand brings hardware acceleration to flash meaning the GPU can be used) how much difference will it actually make? Are we taking, "Wow, this works amazingly better!" or, "OK, I'm getting another 3-5% boost in performance."?