I think there have been a few Blinbox offers posted today but for new customers this seems the best deal - £10.00 free credit, no subscription or payment details required.
Oh, and I'd like to add something to that:
MVC6MOVIE - gives £6 off
DSPYFIVE - gives £5 off
Giving a total of £21 free movies
Plus an extra £1 for every 'friend' that signs up (or for every email address you have)
More info from SeanUSX: Can only download and watch on one PC, cannot transfer to DVD or Portable Device. Can also not be downloaded to Mac.
SeanUSX here AGAIN:
Codes no longer work, just the original deal for £10 credit!
I think the OPs gone on holiday...