Just ordered a 24" 3.06 GHz refurb from Apple with 4Gb RAM - £700 off. It clearly states on the product info page that it can take up to 8Gb RAM. I visited Crucuial, and using their Memory Wizard thingy, selecting this machine it says that 4Gb is the limit. Who's right? Also, not sure how many slots there are in this machine. If I want 8 Gb am I going to have to ditch the 2 x 2 Gb to buy 2 x 4Gb??