The Tales game being released on the PSP is a port of Tales of Eternia, which was originally on the PSX (named Tales of Destiny II in the US, not to be confused with the PS2 game which didn't see an English release). The DS is receiving a new Tales game called Tales of Tempest, and the GBA is getting an old port of Tales of Phantasia.

As of now, only Tales of Phantasia has been announced for release outside of Japan. I'd be surprised to see PSP port of Tales of Eternia make it outside of Japan.