Nokia's N-Gage will being shipping in October according to Reuters. The phone/gaming device looks quite similer to a Gameboy. It will cost $299 in the US which is quite a lot more than a Gameboy, but you can't make phone calls on a Gameboy. The downside is Nokia is making consumers by games... At $30-$40 a pop.
Update: Nokia let us know that Tony Hawk Pro Skater will be available for the N-Gage. It will boast high-end features like multi-player game play via Bluetooth and the ability to upload high scores. That's sure to sell a few handsets.