I didn't actually buy it in GBP, I just converted it roughly for Andrew's convenience.
I bought it on NewEgg here http://www.newegg.com/Product/Product.aspx?Item=N82E16856167032&Tpk=msi%20wind%20pc
For US$140 and purchased a 1GB stick of SO-DIMM RAM locally for about AU$15 so that works out roughly to GBP80
But note that NewEgg (as with most US online sites) does not ship "overseas". I got a friend in San Francisco to bring it to me when he came over (was small enough to fit in his backpack
In reality it cost me a lot more than that, as it was DOA, and he had to take it back with him, shipped it back to NewEgg, who sent it back again saying they wouldn't accept it for RMA without its original box which we didn't have. Then I called MSI USA in CA and shouted at them a lot (the guy hadn't even heard of the Wind PC and thought I was talking about the Wind laptop!) until they agreed to RMA it directly. Shipped it to them, they shipped my friend back a new one, then he airmailed it back to me in Sydney. So shipping costs were substantially more than the unit itself ... about which you can imagine I was unimpressed! But the principle is there for others so i thought I should let you all know.
The unit is essentially silent, generates almost no heat, runs on tiny amounts of power (less than 40w and I believe that is including a HDD which I'm not using) and performs very well with the exception of the NIC and PSS issues. The power supply is an external adaptor the same as a laptop supply which you can just replace the mains cable piece with a local one for your local power plug standard - it accepts 110-240v 50/60Hz. I have no idea what other countries it is available in. Originally, I think only the US, but it has been out for about 4 months now, so it should be available in EU by now.
Actually just found some "used for eval" units here in Australia for around US$220 including 1GB and 160GB HDD. So if they are available here, now, then they will definitely be available in the EU.