beta begins on September 13.
PC Assassins are probably noticing an emerging conspiracy (by the Templars, perhaps?). The series never seems to make it out on the same day as consoles. Both Assassin's Creed and its sequel came out on PC a few months after their console counterparts -- with some extra DRM drama tossed in for good measure. Assassin's Creed: Brotherhood is still expected for Xbox 360 and PS3 on November 16 and 18 in North America and Europe, respectively.