I’ve finally had time to redo some of the styling for this site, so I’ve given comments a makeover and switched back to WordPress’s comment system. Initially, I used IntenseDebate to avoid having to style the comments. It was a good idea, but unfortunately I never got the motivation to finish it off.
Oops!
Did you look at Disqus? I prefer them to Intense Debate though I know Automattic bought the latter. There is also LiveFyre or something which works very poorly and actually prevents me from leaving comments on blogs. I don’t recommend that.