Seen on Aint It Cool News...

J.J. Abrams & Co. are smitten with the notion of Matt Damon as James T. Kirk in their forthcoming theatrical relaunch of STAR TREK.
The post on Aint it cool also says taht Abrams has already spoken to the original Kirk, William Shatner, and has receved his blessing on this.

William Shatner last played Kirk in Star Trek Generations, before the movie series handed over completly to the next generation cast