Just throwing out an idea, but another board I go to, which I believe is also
VB, has it set up, where you can give posters karma/rep points on a post they do. They have it set up with negative Karma to, but I think you can just do the one...and you can put a short little message with it like "Great post" or something like that. Other than a little bar next to the name and whatnot that says like "so and so is love/has alot of friends/whatever" no one else sees your points or anything.
Am I explaining it clearly enough? lol
Anyways, I dont know, how well it would do on this board, or if anyone would even want something like that.
Its been really successful and fun