Please find the link to an introduction from Zack Snyder from the set of Watchmen [1].
Check out the official Watchmen site [2] and remember... Watchmen opens nationwide on March 5, 2009.
Links:
[1] http://pdl.warnerbros.com/wbmovies/watchmen/zack_greeting/watchmen_greeting.mov
[2] http://watchmenmovie.warnerbros.com/