Well MobiTV on '3' offers (for some Nokia handsets) GMTV, ITN News*, Smash Hits, The Weather Channel, Kerrang, Kiss*, Bravo*, Cartoon Network*, CNN*, Bloomberg, Fashion TV, LivingTV, Shorts TV*, iFilm, ToonWorld, Maxx Sports, Comedy Time, Extreme. Those with a * are available for £5 for 31days, or all channels can be had for £10 for 31days.
unfortunately my handset isn't covered ir I'd give it a go.
The other channels, which are really loops updated weekly, available on almost all '3' phones are MTV Shows, Nickolodeon, Paramount and VidZone. Each are £1 for upto 20 connections for upto 20 moniutes each in a 24hour period. Alternatively you can pay £5 per month, but are still restricted to 20 mins per access.