God of War III has been given a firm North American release date of 16th March.
You can read all about it on the US PlayStation blog. Also, look forward to a new trailer for the game debuting on February 11th.
A 16th March appearance Stateside would seem to indicate a 19th March release in Europe, but that's unconfirmed at present. Sony indicated the 19th was a "tracking date" to VG247 earlier this week. Expect confirmation soon.