I've written a Perl script to add support for comments to my blog, try clicking on the comments link at the bottom of a post to try it out. If you want to have a look at the source code or use it yourself grab the actual script.
If you find any problems or have any suggestions feel free to drop me a line.
-- EDIT: 04/03/2008 --
I've upgraded the comments script to version 0.2 "Silly Salamander", I added server-side validation (The lack of server-side validation in 0.1 is the reason for the Silly part of the version name), fixed some warnings, and added a feature to email me about new comments.