I have looked for this but can find it so here goes:-
I just got 30 days free rental with blockbuster online- any O2 customer can get it- its one of the treats, just dial 2211.
Remember to cancel before the end of the month though to avoid the monthly charge
Love film are doing a two week free trail- so this is twice as good as that
Oh yeah you also get a free Xmas dvd to keep: bad santa, fred claus, christmas carol, elf or miracle on 34th street