Ha! I'm not sure if this website is made in jest or not, but it makes me giggle. Follow Cost calculates just how annoying it will be to follow a particular user on Twitter. Annoyance is measured in milliscobles, or 1/1000th of Robert Scoble's Twitter output (twitter.com/scobleizer). For example I (twitter.com/onefloorup) am only 40.82 milliscobles of added annoyance to your life, where as Guy Kowasaki (twitter.com/ guykawasaki) is 1661.68 milliscobles of annoyance (no offense Guy). In case you don't find a lot of tweets annoying, they also show the percent of recent tweets that mention politics and the percent of tweets that are @ replies. Ha! This would be much better if you could specify that things that found annoying and then rate each user based on your criteria.