@JLeuze - Like Ian Stewart said on Twitter, I think this is the right way to go about it. I mean, if they opened up a forum hosting service to WordPress.com members or worst, the general public, I think their infrastructure would melt down or it would suck up money. So, I think this is a good way to start and perhaps somewhere down the line, the infrastructure will improve to the point where WordPress.com users will have a paid option to have a forum attached to their site.