Sony Ericsson X10 Free on an 18 month deal for £30 a month, and 4 months free this weekend only!
Don't forget your quidco either! (Obviously at this point people always start moaning about not getting it, but follow the instructions on the quidco site and you can't go wrong)
As people will notice will of noticed from my profile, I've an eye for a mobile deal, and this is the best I've seen. Whether or not this runs further than the weekend is to be seen, but havn't found a better deal for a contract smaller than 24 months.
Lastest Sony smartphone, and a real return to form after the issues with the Satio.