Pokemon B&W English site opens (Spring 2011 release); legendary mascots revealed

yet again to be moved.

http://www.pokemon.com/blackwhite/en/

The Japanese official site, http://pokemon-sp.jp, has announced a September 2010 Japanese release. It also provide slightly more info on the mascots:

Pokemon Black's mascot: RESHIRAM (pure white body)
Pokémon White's mascot: ZEKROM (pitch-black body)

As with the other legendary Pokémon, their names are common to each language edition of the upcoming release.

Both Pokémon have played major roles in the Isshu region's history, and they hold the key to a major part of the upcoming games' plot.