If you have a wordpress blog, you can try out Disqus and it will keep your comments even if you disable it. I used Intense Debate for my Wordpress blog. After

If you have a wordpress blog, you can try out Disqus and it will keep your comments even if you disable it. I used Intense Debate for my Wordpress blog. After some annoyances, I disabled it and switched back to Wordpress' own comments. I'll probably try out Disqus when I have time... It will irk visitors, but you can switch between commenting systems if you want to test.