While the all-time most popular link at the bottom is a nice step in using the reputation data to aid discovery, it would be very nice to have a sidebar widget that showed the most liked recent content.
Getting the recently high-rep stuff could be made overly complicated, but could also be as simple as showing the highest ranked posts that have received votes within the last N days.
I've been wanting something like this as a sidebar hook for a while. Since, as [URL= claimed here, the current reputation system is really reputation for posts, it would be nice to be able to leverage that to highlight the currently popular posts alongside the new posts, etc...
The problem with the current system is that a small group of people determined to use all their rep opportunities to move a particular person can dramatically outweigh the natural organic repping that person receives (at least on my board).
It seems like this system was really designed for post-level reputation (e.g. for Slashdot-style filtering) but then decided to also tally the post-level rep to create user reputation. Because a person's reputation is simply the sum of the rep of all of their posts, it's easy for someone to pump themselves up (having a small group of supporters rep their posts up over and over) or exercise a vendetta to knock someone down.
The OP is right that the solution is to have some limit to the amount one person can move another person's reputation.
My idea would be to count only the aggregate of my rep of your posts toward your personal rep (e.g. if of the rep I've given your posts, 75% is positive and 25% negative, call my contribution to your rep +.75). This would make each person's rep the true average view of the community (and wouldn't suffer from the exponential growth of everyone toward infinity that some other rep systems suffer from).