"At the 2007 Tokyo Game Show, three new installments in the series were revealed. Kingdom Hearts 358/2 Days, focusing on Roxas, will be released for the Nintendo DS, while Kingdom Hearts Birth by Sleep, focusing on new characters, will be released on the PlayStation Portable. Another game, Kingdom Hearts coded, focusing on King Mickey, will be released to mobile phones.[44] Currently the titles are only confirmed for a Japanese release, though Square has plans for releases in other territories.[45]"

Poked around on wikipedia.

Damn, now I need to go and get at least a DS. Been wanting to try out those new Pokemon games anyway~ -shot-