It was in Nintendo Power, and they have as good a Nintendo release list as anyone...seeing how they are owned by Nintendo.
It likely is not ready to show yet...if you look at the (excellent) DS coverage, you can see a lot of no-shows of many of the anticipated Japanese titles. Square-Enix, who has some of the highest profile DS titles around in development, doesnt seem to have anything to show just yet.
Outside of Nintendo and a handful of American publishers (like Ubi and Majesco with Nanostray and Guilty Gear) there aren't too many others yet showing their wares for the DS (Konami, thankfully, is one of them...I wants my Castlevania). EA doesnt even seem to have anything on display, yet we all know they have their list of usual suspects in development.
In regards to the japanese third party games, lets wait for the Tokyo Game Show before we panic about cancellations...
Anyways, good lord the DS has an awesome lineup coming this year ^______^