On a recent 1UP Yours podcast it was revealed that a new Grand Theft Auto is coming.
"There's another Grand Theft coming but it's not on the system you think it is. There's another GTA that they haven't announced yet, that's not on a console. They haven't announced it... but... It's a handheld. There's a handheld GTA coming"
I guess we are going to see a new GTA title for the iPhone in 2009.