On certain other Q&A sites, one obtains 2 reputation for every suggested edit but no reputation for an unreviewed edit. This is not the best approach for us tot take here, obvuously, because this does not even measure the value of the edit, and whether it was suggested or not is a meaningless parameter to take into consideration. The moderators there argue, that a suggested edit needs approval, but an unreviewed edit does not and therefore is less likely to be constructive. But this is a meaningless argument, because a suggested edit is just reviewed by other 2k+ users, whereas a 2k+ user themselves propose the edit in the case of an unreviewed edit. Yes, two users need to approve the suggested edit, but that in itself is silly because a single user could carry out the edit themselves.
Anyway, so I think that we should certainly not copy that feature from many Q&A sites. But I wonder if we could have some sort of a feature to reward tasks that don't yield any incentive otherwise, including editing, voting to ________, etc., on main. I.e. we could have a thread, offering an incentive of say, 50 reputation, or 100 reputation, for different such tasks and people could propose other people (or themselves if they're greedy : ) ) to get one of these incentives, and with enough votes on the nomination, the number of reputation points can be awarded to the proposed user by an administrator (it is simple, just go to the profile page, and add "bonus points").
Actually, I don't even have an opinion on this myself, but I'm just proposing the idea, because I think it may encourage users to make constructive edits, help with moderating Physics Overflow, etc. The thread would be in the "Community Moderation" category, so that only reputable users can vote for users to get the awards.
This could be especially useful in the "Reviews" section, where users should be able get quite a lot of reputation, say 200 or 250 points, for making edits to submissions, since they help summarise the paper's results to people.
This is just a proposal, I don't even have an opinion on it myself, actually.