I don't think I'd care for a maximum number of votes. I think there's a big difference between getting 10 votes and getting 30 votes, for example.

I'm not sure how I feel about changing the weight of a vote. I seem to recall having blabbed about this before.

If the weight of the vote were dependant upon level, I think a way to do it that would scale fairly well would be to have the level affect the chance of gaining exp from the vote. An example would be having every level above friar give the current (1 in 3) chance of exp, while friar level would give a 1 in 4 chance, monk would give a 1 in 5 chance, and so on.