I wasn't going to pay the stupid prices (£400 odd) that Apple want for 4GB in a SR MBP, so I've been looking around for better prices for the upgrade. The best price I can get, including shipping, is £124.40: http://www.shopmagenta.com/product/MAU1001839.aspx I've posted this because I'm interested if anybody has managed to find a better price and also to let people know that better deals are available if you look. BTW: Hope nobody made the mistake of purchasing from Crucial: http://www.crucial.com/uk/store/mpartspecs.aspx?mtbpoid=FF1F93F9A5CA7304 £270.24 !!! Ouch! -EDIT- Crucial have dropped their price now by ~£100. Memory arrived, very well packaged and it's genuine Kingston. Uses Micron chips - identical to those found on a stick of Crucial.