Yo
You will need Kingston DDR2 667mhz 200pin SO-DIMM memory. £31 for Ebuyer http://www.ebuyer.com/product/119498 - definitely worth the investment and very easy to install and doing so doesn't void your warranty either.
sure about that? From what i recall of the conversation, the warranty not being voided statement was only valid in the US because it was against US law and I haven't seen a statement by ASUS saying that it does apply to the rest of the world.
Cheers, Rob.