I implemented a simple comments plugin tonight for Blosxonomy - loosely based on the pyBlosxom comment plugin. pyBlosxom's comment plugin is a little more involved than I was shooting for, as one of Blosxonomy's goals is simplicity. Mine simply checks the post data for a comment, verifies all the information is there, and writes out a comment file with a simple format:

Comment Author
Author's email
Comment body

The plugin requires the current code base, which I'm going to post over at Blosxonomy sometime tomorrow (I still need to do some sanity checking on it). In the meantime though, feel free to start leaving comments!