I've finished version 1.0 of this blog's comment system.
Each blog entry now has a "Comments" link below it, along with the number of comments that already have been posted for that entry. If you're using a modern browser, clicking the link will dynamically display the comments below the blog entry, without having to reload the page. If you're not using a modern browser, clicking the link will load a new page with all of the comments.
If more than 5 comments have been posted on a particular entry, a new page will be loaded regardless of whether your browser is nifty. I did this to keep this site's bandwidth low (i.e., comments will only be preloaded if there are 5 or fewer).
I hope this fosters some good discussion. I've already received a few e-mails from people requesting this feature, so I'm very excited to see whether it catches on.
NOTE: I was inspired by Andrew Porter Glendinning's comment system. Mine is a little different -- no pop-up windows, more bandwidth-efficient, style differences -- but I figured I should give credit where credit is due.