Hi Paul,
I have agree, I'm running Disqus on my blog and it is amazing. It hink they have really done their homework and rolled out a product that was sorely lacking before.
I like that all my comments on your site and mine are all together and I like the stats that Discus generates too.
I like that I can RSS feed my comments and do interesting things with them.
Viva, web 2.0, viva.