Parokki on 03 February 2008
I don't think it's coming for a few more years. The reason Nintendo can keep releasing virtually the same game with a few new things is how they do it so rarely.
Red/Blue - 1996
Gold/Silver - 1999
Rube/Sapphire - 2002
Diamond/Pearl - 2006
Looking at history, I'm guessing 2010. They'll probably have a new handheld by then.
