This is sort of like Amazon marketplace without the Amazon part - a bunch of independent sellers and smaller companies hawking their stuff. There's R1 DVDs in there and some sellers have Criterions up, if you're interested in that sort of thing. Plenty of other weird and wonderful stuff there too if you look around a bit. It being a marketplace site, some sellers have better ratings than others, buyer beware, etc.
The reason I mention it is that they're doing some pretty good discount codes at the moment.
for £5 off a first purchase over £10
for £3 off £10 purchase
for £10 off £30 purchase
for £15 off £45 purchase
for £20 off £60 purchase
All the above are single use, don't stack, and expire on 31 March 2011
, so get in quick if you see anything you like.