I've just confirmed a rumor that a new Five Guys may open in Williamsburg in December 2009. Craig Cohen, owner of the Five Guys franchise locations in Brooklyn Heights, Bay Ridge, and Park Slope told me the new location will be near Bedford Ave. but no lease has been signed.
Clearly his other locations are doing well to warrant a 4th location in 2 years. This location could be his biggest winner yet and put a local fave like Dumont Burger on the defensive (I know there's no comparison but try asking for a free refill at Dumont, or fast service).