Rael Dornfest has written a "blosxom," a simple and powerful perl-based blogging app. If you've got a machine with perl and a webserver installed (i.e., an OSX or *nix computer), you can run blosxom (pronounced "blogsome" or "blossom") and publish your blog just by writing simple ASCII files into a directory.
Blosxom is a lightweight (to say the least — it's