I'm always interested in finding out which posts people find the most useful and surfacing those posts so that they are discoverable even after they scroll off the front page. There are indirect ways of doing that---seeing which posts are most viewed, have the most comments, are most tweeted, etc.---but those methods all have their limitations. So I'm adding a direct "rate up/rate down" feature for each post. Top-rated posts will appear in a list in the sidebar. It's one click. Please do rate up the posts you like (and rate down the ones you don't, I suppose).