Not sure why people are worried about Warner UK. They recently did a very good job with Beowolf. They also released Training Day in VC-1 which looked much better than the US MPEG-2 version. If you like the film and have the $$ then order it.
There is no news at the moment however every sony release thus far in 2008 has been region free so signs may be good. Check the following website over the next fews days as they normally post the region status of all new releases they sell:
or another site that provides region info:
They havent stated anything thus far. Think we are going to have to take a "wait and see" approach. I've ordered cloverfield anyway as even if it doesnt work I reckon I'd be able to sell it in the UK for close to what I paid for it.