A Piper PA-32-300 was reported missing after departure at about 0700 from Staniel Cay, Bahamas. Visual meteorological conditions prevailed and no flight plan was filed. The airplane has not been located, and the whereabouts of the airplane and pilot are unknown. A witness reporting seeing the pilot board the airplane and depart to the southeast. Inquiries as well as subsequent searches did not reveal any information as to the whereabouts of the pilot or the airplane.