Rebecca Romijn-Stamos, in front of the cameras on the Summit Entertainment/Endgame Entertainment production "Alibi," is in negotiations to be the woman to Ben Affleck's "Man About Town." The project is being eyed for a late-October start, with Mike Binder directing from his script. Individual producing credits also are still being worked out, with Media 8 producing and 3 Arts Entertainment likely to receive producing credit as well, according to sources. "Man About Town" is the story of a top Hollywood talent agent (Affleck) who seems to have it all -- success, money and a beautiful wife (Romijn-Stamos). But it all starts to unravel when he finds out that she is cheating on him and his journal has been stolen by a journalist who could expose him. Romijn-Stamos is repped by WMA and 3 Arts Entertainment.