The New York Times reports on the increasing popularity of fencing with the long sword. This has been a long time in the making. Reenactors, role-players, etc., have all had their hand in giving birth to a real interest in trying to figure out what life in Medieval and Renaissance periods were like--including figuring out how the weapons were actually used.
If this interests you, here are a couple of extra resources: John Clements has written books on both Medieval Swordsmanship and Renaissance Swordsmanship as well as other books and articles. The NY Times article also mentions a website, Wiktenauer. I've done some modern fencing, but not the older stuff. It looks fun.