I just checked my latest Nintendo Power (the January issue, volume 187, with with a big white NDS cover) and all I could find was that "Tales of Phantasia" and "Tales of the World: Narikiri Dungeon 2" were listed in the GBA section of the Game Watch Forecast page.
They've both been there for at least a year now. I don't think it means anything.
Narikiri Dungeon 3 (the one with Symphonia characters, it's not placeholder art, it's a "crossover" game) should be coming out in Japan in January.
Narikiri Dungeon 2 (the one NP seems to be waiting for) came out in Japan back in October 2002.
I don't think we're going to be getting any of them. Namco sucks balls when it comes to their American releases. I suggest illegal bootlegs.