I've read a few good reviews so far; this one by Kenny Penman at Forbidden Planet made me go all melty!
And another good one by the fabulous Paul Gravett, who put in the initial good word for me with David and got me going. And don't miss Lew Stringer at Blimey! and John Freeman at Down the Tubes. (Thanks to Garen Ewing for those links!)
For anyone's who's especially keen, there's a great podcast of the speeches by David Fickling, Nick Abadzis and Philip Pullman at the launch, with Alex Fitch on Resonance 104.4 FM.