I'd love a free link without nofollow on the leaders page. I'm not sure that it's actually a good idea to have rewards for the highest karma, it seems like a bad idea to make the karma overly meaningful.

I also put this on the features page, but I think separating submission karma from comments karma would also be a useful expansion. Perhaps a few columns of leaders using different metrics would work. For example, top leaders, top submission leaders, top comment leaders, and then maybe some time ones, like upcoming comment leaders, etc.

Who honestly cares about Karma? I find it useful if I want to skim the posts/comments for a good one, but holding it up like it was some kind of achievement just distorts the whole point of the site, which is to keep up on things in startup-land. When you spend your entire day working on your karma score, you might as well go play WoW. No offense Paul, but WoW has way better 3d graphics!