OK, so I'm almost 100% committed to switching to another weblogging solution and hosting it out of my house. Under consideration are greymatter, blosxom, and blogtari.
Greymatter is interesting because it is pretty feature-packed and has a nice GUI for entering posts. On the downside is that it needs a separate "install" directory for each weblog (and I have three), and it might be a bit complicated to manage over time.
The other two don't have a GUI, and rely only on the basic filesystem to do their thing. Of these two, blosxom is attractive because it is so minimalist (<150 lines of Perl at last count, which is impressive), and it supports features that I find interesting. On the downside, it's written in Perl, which is just not my cup of tea (but I never tried all that hard). On the other hand, blogtari (which has an ancestry based in blosxom) is interesting, but incomplete (for my desires). However, it's written in Ruby, which is my cup of tea, so it's eminently hackable by yours truly. I've been trading mails with the author about its future. He's done a great job so far, but I think I'll hold off on committing to it until I've seen his next release.
Oh, and I guess I shouldn't forget blojsom, which is blosxom written in Java, and having more features. I guess I wouldn't mind hosting a java-based weblogger running on Tomcat and jacking around with configuration of a servlet engine. Wait a minute -- actually, yes, I would mind it!