I thought it would be a good idea to have a Cashback Site Feedback and referral thread as many people do not know what they're all about and are missing out on the pennies! Also people may be a little bit worried about them being a scam but if you join the well known ones they should be fine :)
Here is an explanation about what they are and
here is a fab guide telling you all about them
Often, current users can refer friends and other people and make cash from that, the more people you refer, the more cash you accumulate and it can easily be transferred to a bank account or a cheque issed. My referral link is here and for every person that joins and earns £5, I receive £5.
Maybe others could also add their experiences and referral links also :)