Thanks to some very late improvements to Blogger's commenting system, the "recent comments" section in my sidebar is currently out of order. It won't list any of the new comments. So you'll have to make an effort and scroll down to the bottom of each post to check if there's anything new. Hopefully BloggerHacks will have a fix for the problem soon.
But you can still leave comments to any post without any trouble, so don't stop writing.
Update (6:35pm): The 'recents comments' section has been fixed so everything should be back to normal now.