Me on 31 March 2008
It's not ported from the PS2 as Soriku said - the one thing they were the proudest to announce when this was first unveiled was the fact it will be remade from the ground up for the Wii.
Off the top of my head it was announced around October time last year at some kind at gaming day with art character drawings and that was about it so i'm expecting fall 08 for US and Japan, probably 09 release for Europe / Aussies will get it god knows when, next leap year probably as they always get a bad deal.
