Apparently, Sega and counltess other companies are supporting Nokia's new handheld called N-gage. Sega will be making a sonic game for the handheld called Sonic-N which will enable you to use Sonic, Tails, Knuckles, and Amy in the game. The other games that Sega is planning on developing are Virtual Tennis, Puyo Puyo, Super Monkey Ball, and Sega Rally. This obviously shows that Sega is planning to be in the cell phone inustry for a while.
Source: *Gamespot*