Instructions:If you go to http://www.lovefilm.com/freegift
And use the code LFZZ98778
You can get yourself a free 3 month long (90 day) trial, providing you choose one of the unlimited discs option.
And if you send all your discs back and cancel before the end of the trial you won't have to worry about being charged any money at any point.
If you've already used Lovefilm or used Screen Select on a trial or properly, this free trial will still work.