The pilot was executing a wheel landing in the PA-18A-150 following his return from a glider tow operation. Witnesses at the airport reported that the aircraft landed long on the westerly runway (approximately 1,200 feet beyond the threshold of the 2,200 foot long grass/turf strip), and was also fast. During the landing roll the aircraft nosed over. The pilot and an FAA inspector reported finding no mechanical malfunction with the aircraft. The pilot reported a total of 2 hours of flight experience in the make/model aircraft.