Belegarth has no specific rules I know of about the beveling of blade edges. Dag has the rule that the blade edge needs to be 1.25 inches wide, but still does not specify curvature or beveling.
I started encountering beveled edge weapons when they showed up with one player who had made the bevel on the edge with a triangle of open cell foam. He argued that it did not concentrate the impact of the blade since this triangle collapsed instantly to the more standard closed cell foam sword construction underneath. This seemed a pretty useful way to do it, so I allowed it in my local group. The problem was that others saw what he had done and they started to bevel the edges of their closed cell foam swords a bit. This has actually not been a problem since they are only slightly beveled and not at a very steep angle.
So what do people think? What have others experienced? Anybody have any recommended guidelines?
Seldon