The companies on the list are (click on a link to see their site):
Most of the companies are involved with announced first party N-Gage games: Digital Legends are doing "One", Gameware are doing "Creebies", Ideaworks3d have done many games including "System Rush Evolution", Infinite Dreams have done "Creatures Of The Deep", Jadestone are doing "Dirk Dagger", Method Solutions have done "Space Impact Kappa Base" and Rovio are doing "Bounce Boing Voyage".
That leaves Firemint, FloodGate, Gamelion and Q Entertainment on the list but without any announced N-Gage games to their name. If they're doing first party games then the titles they've already published probably won't be appearing on N-Gage, because first party games usually involve brand new franchises owned by Nokia.
Q Entertainment is perhaps the most intriguing because they're in Japan, and they have a fairly distinguished history in Japanese portable gaming. Amongst other things, they did Lumines for the PSP and Meteos for the Nintendo DS.
