Yes Pokemon Black and White have been dumped a link below (but not from the site I downloaded :p) Get them now before they disappear.(Japanese)
Pokemon White http://www.rom-freaks.net/download-5606219-file-5215___Pocket_Monster:_White_(J)-nds.html
Pokemon Black http://www.rom-freaks.net/download-5606220-file-5216___Pocket_Monster:_Black_(J)_-nds.html
PS. If you care about numbering the roms
they could also be DSi 0079 for White
and DSi 0080 for Black
Pokemon White http://www.rom-freaks.net/download-5606219-file-5215___Pocket_Monster:_White_(J)-nds.html
Pokemon Black http://www.rom-freaks.net/download-5606220-file-5216___Pocket_Monster:_Black_(J)_-nds.html
PS. If you care about numbering the roms
they could also be DSi 0079 for White
and DSi 0080 for Black