I guess it might be okay if you live in Japan and/or can read Japanese. But I don't/can't.
North America: * The Chase: Felix Meets Felicity * Imagine: Cheerleader * Jojo's Fashion Show * Coraline
Australian releases: * Neopets Puzzle Adventure * 100 Classic Book Collection * Word Academy * Sim Animals
European releases: * SimAnimals
Japanese releases: * Final Fantasy Crystal Chronicles: Echoes of Time * Hirameki Action: Chibikko Wagyan no Daiki na Bouken * Sid Meier's Civilization Revolution * Taiheiyou no Arashi DS * Vampire Kishi DS
rumor of the week: developers have supposedly been told the 2.40 firmware update will include - in game messaging - achievements/trophies - ability to play your own mp3s during games Basically, things certain other systems had long ago.