I saw evidence of the mirrored threads, and became curious. I think this is a great idea -- often times I'll go to a popular article on a popular blog or publication site and read the comments. Facebook seems to be the more popular medium for posting comments, but the "share" and "like" features of Facebook invite a lot of noise from users submitting content lacking in quality, depth, and structure. This leads me to brush off most of the comments because I'm usually looking for interesting and thoughtful, and this seems to follow in the right direction. I'm also really glad to see that Hubski has no issue of pulling anything which deviates from its original mission. I do wonder how Hubski will be able to manage the uptime as new users come in...