HP are offering 10% cashback on a range of laptops bought before 31st January 2010. You DON'T have to buy direct from HP to claim so go find the cheapest laptop from any retailer and you will get 10% back of the price you paid (excluding vat). I bought a HP 4310s from here http://www.dewgraze.com/offers/hpjanuarysale2010.cfm
Go to http://www.hpcashback.com
to submit your claim. It also has a drop down list to show you which models qualify.