I just setup the Popularity Contest plugin for WordPress. It was real simple to setup, upload it, enable it, pick your settings and put it in the sidebar or somewhere “outside the wordpress loop”. It only added 2 more queries to the home page. It seems to work well with version 2.2 also. There is an option to show the popularity of each blog on the post itself at the bottom, personally I think this is more of a debug feature (so you can figure out why something is ranking higher than something else) and not really something readers will care to see. You can also adjust the ranking weights. It has several samples of “template tags” to put in also.