I am now using Disqus to handle the comments on my blog. Disqus is a new global blog commenting system. It has a lot of nice features, such as avatars, threaded conversations and global notifications. It allows you to track when a comment you posted got replied to and will in the future even support SMS notifications (hopefully this will work in Belgium as well). The Disqus forum page for this blog can be found at http://intraction.disqus.com/.
They have a simple WordPress plugin that you can install. I ticked the option “Replace all entries with no comments (including future posts)” to keep my existing comments, and use Disqus for posts without comments. When they have an import system, I will probably import all existing comments into the system as well.