C172 landing at BWG on Runway 03 while a C150 is landing at the same time on opposite direction Runway 21. The C172 pilot did not hear comments or position reports on CTAF from the C150 pilot.

Narrative

Aircraft #1 (C172) was on an IFR flight plan to BWG. At 12nm the airport was called in sight and IFR cancelled and switched from ZTL Center to CTAF. An immediate announcement was made on the CTAF; 123.0 indicating that #1 was at 3000 FT 12nm south inbound for landing Runway 3. The ASOS; previously received gave the wind at 350@5. An open cockpit aircraft reported on CTAF that they were going to depart Runway 21. Aircraft #1 then reported that a 45 entry to Runway 21 would be executed and still at 3000 feet. The open cockpit aircraft then stated they were confused and that they were going to depart Runway 3 and depart northeast. The open cockpit aircraft; then departed Runway 3 and reported heading NE. Aircraft #1 then advised that he was proceeding to Runway 3 and any traffic in the area; advise their position. There was no response on CTAF. Aircraft # 1 then stated the he would proceed straight in Runway 3 and reported at 5 NM and 2 NM final for Runway 3. As Aircraft #1 had flared and touched down; Aircraft #2 (C150) was spotted just over the tree line landing on Runway 21. Pilot of Aircraft #1 judged that the point of going around and continuing the landing had past. Then maximum braking action was initiated and a quick turn to exit the runway at the first turnoff. Aircraft #2 was 3000 FT away at this time and had landed on Runway 21. After taxiing to the ramp and shutdown; a witness in a C172RG congratulated the pilot of Aircraft #1 for recognition of the other aircraft and the evasive action. Aircraft #2 was never heard on the CTAF frequency and taxied to the other side of the airport. No contact was made by Aircraft #1 pilot with Aircraft #2 pilot.The wind was favoring Runway 3. The previous departure had used Runway 3. The open cockpit aircraft mistakenly stated he would use Runway 21. Aircraft #1; then wishing to conform; indicated he would use Runway 21. After the open cockpit aircraft stated he would use Runway 3; Aircraft #1 returned to an approach to Runway 3. Perhaps Aircraft #2 had a radio and heard Runway 21 in use. There were at least 4 transmissions from Aircraft#1 stating that a landing on Runway 3 was in progress. The Runway was 150 FT wide and the 2 aircraft could have passed in opposite directions if necessary. The aircraft were not any closer that 3000 on the runway after landing.