As it says in the title, all models available: £339 i5; £479 quad i7 (standard); £619 server; £619 2.6 quad i7
http://store.apple.com/uk/browse/home/specialdeals/mac
http://store.apple.com/uk/browse/home/specialdeals/mac
They're back, just ordered a quad core for £479 on PayPal 0% credit