ON LNDG AFTER AN IFR APCH INTO LEE ARPT; A C340 PLT SEES A C172 ON A GAR ON THE OPPOSITE DIRECTION.

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I WAS ON A INSTRUMENT FLIGHT PLAN WORKING WITH ORLANDO APCH. I WAS MAKING AN INSTRUMENT APCH TO RWY 13 AT LEE THE ASOS SAID 1 3/4 MILE VIS UP FROM 1 1/2 A FEW MIN EARLIER. I HAD MY #2 RADIO TUNED TO LEE CTAF TO SEE IF ANYONE WAS IN PATTERN. I HEARD NOTHING. AFTER I WAS ESTABLISHED ON FINAL APCH ORLANDO RELEASED ME TO CTAF. I ANNOUNCED MY POSITION ON THE INSTRUMENT APCH; BUT HAD NO REPLY. I DID NOT THINK THIS UNUSUAL; BECAUSE THE VIS REPORTED BY THE ASOS WAS 1 3/4 AND WIND 090 DEGREES AT 04 KTS AT 1 1/2 MILES FROM THRESHOLD I WENT BACK ON ORL AND CANCELED IFR AND RETURNED TO LEE CTAF. UPON LANDING I NOTICED A C172 EXECUTING A GAR FROM THE OTHER END. HE AND A PARTNER CFI HAD BEEN IN THE PATTERN FOR RWY 31 WITH STUDENTS WITH 1 3/4 MILE VIS. I DID NOT SEE HIM UNTIL HIS GAR; BECAUSE I WAS LANDING WITH THE SUN IN MY EYES WITH FOG AND MIST. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR IN C340 STATED HE MADE ANNOUNCEMENT AT APPROX 4 MILES OUT BEING RELEASED BY ORL APCH. HE SAID HE HAD BEEN CONSTANTLY MONITORING THE CTAF FREQUENCY AND DID NOT HEAR ANY ANNOUNCEMENTS. SUPPLEMENTAL INFO FROM ACN495069: ON DEC SAT; 2000; MY STUDENT AND I (I AM A FLT INSTRUCTOR) DEP ORL APPROX XA:10 LOCAL TIME ENROUTE TO LEE FOR AN INSTRUCTIONAL FLT TO PRACTICE TKOF AND LNDGS IN A CESSNA 172. WHEN ABOUT 10 MILES SE OF LEE; RECEIVED LEE AWOS; VISIBILITY WAS RPTED AS 1 1/2 MILES; MIST; FIELD WAS IN SIGHT ON HORIZON. CONTINUED FLIGHT IN EXPECTATION THAT GROUND FOG WOULD DISSIPATE SOON SINCE ORL HAD RPTED 6 MILES; MIST WITH INFO X AT XA:53. WHEN ABOUT 5 MILES SE; LEE WAS IN SIGHT AND ALL RWYS VISIBLE; SLIGHT SMOKE AND FOG VISIBLE; VISIBILITY APPEARED TO BE GREATER THAN 5 MILES. CALLED UNICOM AND REQUESTED ACTIVE RWY INFO. UNICOM RESPONDED THAT THE WINDS FAVORED RWY 31. ENTERED LEFT TFC FOR PRACTICE TOUCH AND GOES ABOUT XA:30 LOCAL. DURING THE NEXT HALF-HOUR SEVERAL OTHER SINGLE-ENGINE LIGHT GA ACFT JOINED THE PATTERN FOR TOUCH AND GOES IN ADDITIONAL TO ITINERANT AND BASED ACFT LNDG AND DEP THE ARPT. AT APPROX XB:00; WE WERE ON FINAL APCH TO RWY 31 AT APPROX 200 FT AGL; ABOUT A 1/4 MILE FROM THE LNDG THRESHOLD IN POSITION FOR A LNDG. AHEAD OF US WAS A CESSNA CUTLASS 172 RG THAT HAD JUST LIFTED OFF AFTER A TOUCH AND GO. OVER THE UNICOM WE RECEIVED A TRANSMISSION FROM THE CUTLASS; 'NEAR MIDAIR COLLISION; TWIN ENGINE CESSNA OPPOSITE DIRECTION OF PATTERN TFC; LNDG RWY 13; ATTENTION ALL LEESBURG TFC; TWIN ENGINE CESSNA LNDG ON RWY 13 LEESBURG!' WE IMMEDIATELY INITIATED GAR WITH A TURN TO THE R. SIGHTED THE TWIN ENGINE CESSNA LNDG NEAR THE FIRST TXWY E OF RWY 13 APCH END AND WATCHED IT TURN OFF THE RWY 13/31 AND RWY 03/21 INTERSECTION WHEN ABEAM. FLYING UPWIND NOTICED CUTLASS TURN CROSSWIND. RADIO CONVERSATION WITH CUTLASS OF THE NEAR MIDAIR I DECIDED TO FOLLOW THE CUTLASS IN FOR A LNDG AND ALSO SPEAK WITH THE TWIN ENGINE CESSNA PLT TO EXCHANGE INFO ON ACFT AND OBTAIN FACTS TO FILE A RPT. CUTLASS LANDED AND WHEN WE WERE DOWNWIND AND APCHING BASE POS; AN ACFT CALLED AND WAS CHANGING THE LNDG PATTERN TO USE RWY 13.