Agreed, money typically is a cognitive barrier - but remember we're talking micropayments, and the internet is a BIIIIG place. I think that works in favor of ov

Agreed, money typically is a cognitive barrier - but remember we're talking micropayments, and the internet is a BIIIIG place. I think that works in favor of overcoming that barrier. And maybe, just maybe, the paypal button is out of date. Paypal buttons are little more than a dressed-up hyperlink from 1996 that will take you to a form with stuff to fill out and even more buttons to press (no novelty, redundancy, paperwork, etc). It's also a solitary activity. This is inviting in that you get to see a count displayed from people who have already clicked it (much like the digg button), and invites you to participate in that community. I think that community force is a very strong thing that has yet to be tapped in to. Who I see this working really well for at the Seth Godin-types, where they have really developed a whole tribe of followers who hang on to their (and truly benefit from) every word. These people will want to participate in their online community, and this will be a very tangible and easy way for them to do so.