I would say that the Disqus is a very good solution, especially for the http://api.silverstripe.com site. We want to increase the profile of the API documentation site, and enabling comments here would be very helpful.
The advantage of using Disqus on doc.silverstripe.com is that then we'd have a unified commenting system for both.
a few days ago, i watched a documentation about one, i think, of your most famous guys from new-seeland. 'Sir Edmund Percival Hillary'.
The first one to reach the summit of mount everest.
But he wasn't only a top 'climber', of course i knew that.
What they sayed was, that he did a lot of good things for the poor sherpas, who helped him and many others to get to the top.
He spent years of his live, building schools, hospitals...
So you 'new-seelands' did it again, help others, seems to be your nature ;-)))