Drawing from all the great comments on forums, commenting and online community shaping in general yesterday, we wanted to let that conversation go on a bit further, but take it out of the open thread. We think some kind of forum is the way to go, but would like to find the right model, as we really like our threads as well. Urban Baby seems to work well because there are only three boards and all comments start at the top and are threadable. Now we have some recommendations for YayHooray, Invision and videofitness. What others are good and why?