It actually works! I bought an IPOD case from ebay - i clicked through from the ebay icon on
www.ei42.com/shopping three days ago and i actually got commission back today ! It was only a few quid but its gonna be good say if you buy a telly or similar and your going to use ebay/next/amazon/argos etc anyway as you just click through, register and get money off! I got 2.3% back/off but its better than nothing just for the sake of a mouse click!
Its UK only though at the min.