I think the ratio of good to crap games for the DS is even worse than that of the GBA. At any rate, here's the official Insomnia work-in-progress list. You are free to make suggestions, but I probably won't add them to the list -- at least until I've tried the games myself.
Great stuff
Bleach DS: Souten ni Kakeru Unmei (Bleach: The Blade of Fate)
Bleach DS 2nd: Kokui Hirameku Requiem (Bleach: Dark Souls)
Famicom Wars DS (Advance Wars: Dual Strike)
Advance Wars: Days of Ruin (Advance Wars: Dark Conflict / Famicom Wars DS 2)
Itsuwari no Rondo (Rondo of Swords)
Sekaiju no Meikyuu (Etrian Odyssey)
Sekaiju no Meikyuu II ~Sho Ou no Seihai~ (Etrian Odyssey II: Heroes of Lagaard)
Fire Emblem: Shin Ankoku Ryuu to Hikari no Ken (Fire Emblem: Shadow Dragon)
Worth checking out
Kage no Densetsu -The Legend of Kage 2- / The Legend of Kage 2
Soma Bringer (especially multiplayer)
I'll be adding more as I remember them.