I would be really interested (and I am sure several other people would as well) in a plugin that would display the top users (by posts, submissions or otherwise) and the top communities (by submissions recieved, pageviews etc...).
It would be like the "random users" hook, but sorted by contribution to the community. If something like this already exists, could someone point me in the right direction? If not, I'd love to see if anyone would be interested in putting something like that together. You can reach me here, or at sbspalding at gmail dot com.
Keywords: plugin request, top users