Another point&click adventure, called "A New Beginning", is announced for PC, Wii & DS for Q1 2009:
http://www.adventuregamers.com/article/id,852/
As "A New Beginning" is also published by Daedalic Entertainment, it wouldn't surprise me, if "Whispered World" will be ported to other systems.
Here's a "Whispered World" first look with some more pictures:
http://www.adventuregamers.com/article/id,853/
PC release is scheduled for Q4 2008.