Just got this in an email, and I thought it would be worth posting as quite a few of you have Dell machines, and might be interested in upgrading your memory. I have bought from Crucial before, and I have to say their customer service was *superb*.
They have an additional 5% discount on certain products for the next 3 days - ending 16th of October.
Check the forum thread and I'll post links to all the memory that is on special offer.
EDIT - add promo code "PCANSWERS" to your basket to get an extra 4% off the top of these prices!!! AND use quidco for 7% cashback!!! Oh it's so complicated!