Well, that didn't take very long. Nintendo of Japan has officially announced the next installments in the long-running Pokemon series, Pokemon Black and Pokemon White for DS.
An official reveal of Pokemon Black and Pokemon White will happen on April 15, with both games scheduled for release sometime in 2010. However, Nintendo of America has not announced Pokemon Black and Pokemon White, so we can't say with much authority that's a US release, too.
I can't remember the last time I played a Pokemon game. It might've been Red and Blue.