It's always hard to imagine what will become popular and what won't. This year, the juggernaut by far was the Clayton Homes i-House. In prior years, Digg and StumbleUpon determined the most popular articles. In 2009, these sites didn't have much of an impact on what we're doing. (Maybe we need more controversy, argumentation, or lists or something?) Readers seem to be flocking to Facebook and Twitter … in any event, take a look on the most popular of last year.