Zavvi have this game on pre-order for £12.00 - the same price as the platinum version of the first game. The game is due for release in April.
The same game is £29.99 pre-order at play.com
Description from Zavvi site for the game is:
Roll off on a LocoRoco adventure!
Eat, grow, roll and bounce through weird and wonderful environments. Get your LocoRoco on the move using simple tilting and jumping controls. Solve Puzzles, discover secret areas and bump into crazy characters.
Get a little LocoRoco love in your life!
It's got to be worth a punt - I really enjoyed the first game - simple but addictive.