Well some of you may remember the little device being revealed back with the GameCube in 2000 at SpaceWorld, and it's been almost 3 years with no signs of it, most thought it was dead, but Nintendo has announced it will be released in Japan sometimes in July along with Animal Forest ++ and the American version of the e-card reader in Japan.
Well since it's debut, it looks like the SD Adapter has some changes, it now fits from the side instead of the front and it looks to eb a slighty different design.
http://www.nintendo.co.jp/n10/news/030430b.html