Well the rumour is that Space Hulk is indeed the Mystery Box, apparently full details will go out in a Newsletter from GW later tonight.
I’m still dubious until an official announcement. Games Day Germany Staff were all wearing a T-shirt with a Terminator head on and customers had a Tyranid skull. But that could just be GW winding us up big style!
But anyway.. I’ve changed my Background for my Blackberry to this: