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Well KH chain of memories was already released on Game boy advance. I think this news mean that there could be a Kingdom hearts released on Nintendo DS (which seems very probable) or Wii, but I'm sure it will not be KH3 (but one "out of the series", such as chain of memories or what they're doing with Dragon quest Monsters (DS) and Warriors (Wii))

Actualy Steet CoM isn't out of series it is between KH 1 and 2. CoM introduces Axel, and Nomanie and some other charecters like the rest of the orginazation. Also in the begging of KH 2 Sora is alseep in a capsule. At the end of CoM Nomanie puts Sora into it to restore his memery that was lost during CoM.

I almost forgot that at the end of KH 1 when Sora, Donald, and Goffy are running down a path. When they reach the end of that path it leads them to the location of CoM.

So in general all three games are linked.