If you can't decide between Blinkbox or Lovefilm, then TankTopTV could really help you out. The new website, which has just launched will help you figure out which of 22 different TV streaming services has the show that you're looking for.
I've been hoping someone would finally get around to making this. Whilst I love my Netflix, the one thing that is really missing is The West Wing (or "The greatest TV show ever made", to give it's full title). Thanks to TankTopTV though - I now know that really I should be sending even more money every month Amazon's way - as it's on LoveFilm:
It's not just the big two - TTTV compares catalogues from 22 different places: BBC iPlayer, ITV Player, 4oD, Demand 5, Crackle, Classic Cinema, iTunes, KnowHow, EE Film Store, Dogwoof TV (me neither), Distrify, Sony Entertainment Network, Google Play, Sainsbury's Entertainment, Xbox Video, Virgin Online Movies, blinkbox, Film4oD, Sky On Demand, PictureBox, NOW TV, LOVEFiLM, and Wuaki TV.
It'll even compare prices too - so you can make sure you're getting the best value for money. The website also has a degree of personalisation - if you create an account or login with Facebook you can choose which services to list (no point in seeing Xbox Video, if you don't have an Xbox, etc) - and it will even make recommendations based on what you like.
Right, I'm off to watch President Bartlet fix the Middle East again.