I use overplay - www.overplay.net
I've been using it for about a year or 2? now and its taken me thru 2 series of the apprentice - dragons den - all temporarily downloaded..
one thing! you MUST start overplay before trying to open iplayer - cos if it finds out you in HK it has a tantrum and you might not be able to get it working for a while..
I also use it for streaming Tv-Links : Free Movies links, Watch Tv Shows links online, Anime, Documentaries - some streams arent available to ppl outside the US...
you may have to faff a bit with tvlinks to get the right connection..
but I just watched the 8th season of the Office US - which I think is even better than the UK version! ( rare I will say that!! )
and idiot abroad season 1 2 ( laughed my a## of at Karl Pilkington - he's basically the spitting image of my baby brother
thank the gods for streaming vid - means I have cancelled that POS nowTV!