ABOUT 20 MIN AFTER TAKEOFF, WHILE CRUISING AT 6500', THE ENG LOST POWER. RPRTDLY, THE ENG WENT TO EITHER IDLE OR A WIND-MILLING COND & THE FUEL PRESSURE DROPPED TO ZERO. THE PLT TRIED TO RESTART THE ENG BY USING EMERG PROCEDURES, BUT WAS UNABLE. HE INITIALLY TRIED TO CONTACT ATLANTA APCH CTL (SATELLITE RADAR-P POSITION/SAT-P) WHEN THE ACFT WAS APRX 12 MI NW OF GWINNETT CO ARPT; HOWEVER, HE HAD DIFFICULTY MAKING RDO CONTACT. AFTER CONTACT WAS MADE, HE DECLARED A 'MAYDAY SITUATION,' & 47 SEC LATER, HE WAS PROVIDED A VECTOR TO THE ARPT & WAS ADVISED IT WAS 7 MI AHEAD. SVRL SUBSEQUENTLY RDO CALLS WERE BLOCKED BY OTHER ACFT USING THE SAME FREQ. WHEN THE PLT WAS UNABLE TO GLIDE TO THE ARPT, HE STARTED A TURN TOLND ON A ROAD, BUT THE ACFT HIT A TREE, THEN CRASHED INTO A UTILITY POLE & HOUSE & BURNED. NEARBY PERSONS REMOVED THE OCCUPANTS FM THE ACFT, BUT THE ACFT, HOUSE & 2 CARS WERE BADLY BURNED. NO REASON WAS FND FOR LOSS OF FUEL PRESSURE & ENGPOWER. DOWNING & MATHIS AIRSTRIPS WERE LOCATED APRX 15 & 12 MI NW OF GWINNETT CO ARPT, APRX 3 MI RGT OF ACFT'S FLT PATH.