Just so you know, GTA4 will be on BOTH the Xbox 360 and the PS3, at the same time. Scary, huh?

Rockstar Games, the universally-renowned publishing label of Take-Two Interactive Software, Inc. (NASDAQ: TTWO), is proud to announce Grand Theft Auto IV, the next-generation console debut of the genre-defining Grand Theft Auto franchise. Developed by world-class designers Rockstar North, Grand Theft Auto IV will be simultaneously available for the PlayStation®3 and Xbox 360™ and is currently planned to be in stores in North America on October 16, 2007 and in Europe on October 19, 2007.

And on a seperate release but worthy of inclusion here:

Separately, Microsoft and Rockstar Games are proud to announce a strategic alliance to provide exclusive episodic content for Xbox Live®, giving the community ever-expanding gameplay experiences that simply aren’t possible on other consoles.
“Through Xbox Live, we have a unique opportunity to reach out to our audience in new ways,” said Sam Houser, executive producer and founder of Rockstar Games. “This strategic alliance allows us to craft experiences that fully leverage the on-demand distribution power and sheer size of Xbox Live.”
The agreement to distribute exclusive Rockstar Games content via Xbox Live highlights the publishing community’s growing desire to feed gamers’ insatiable appetite for downloading new high-definition experiences and playing online. Since Xbox Live launched, fans have logged nearly 1.8 billion hours playing online and have downloaded more than 18 million pieces of content in just the past six months.