OK, So heres the dealio.

Japan have had a March release date for a while now.
Amazon.com (US) has March 31.
Amazon.de has nothing.
Amazon.co.uk also has nothing

But, Amazon.fr also says March 31 with a special edition also listed.

I don't think I need to convince anyone who has a PS3 about this game. 1000+ Cars with World Rally Championship, NASCAR, Indy Racing League and Super GT.

And DAMAGE, DAAAAMAAAAAAGE!!!

So hopefully this means March for UK as well, in which case it will be FFXIII and GT5 for the month! Gaming heaven! woohoo!