I've spent the last couple of hours doing more research, and learning more about blog software. This
comparative article on blogware was very helpful.
Weblog Publishing:
Desktop Server
Radio Userland
Perl
Blosxom (Mac originated; usable cross-platform)
Greymatter
Movable Type
Client App
City Desk (Client App $350)
Tinderbox (Mac only)
Weblog Community:
PHP
Geeklog
pMachine (pMachine is free; Expression Engine is $149)
Nucleus
Word Press (successor of b2/cafelog)
I'm leaning heavily toward the PHP options, but there are quite a few to evaluate. WordPress is getting a serious look because of its LiveJournal importer feature; really, after looking at some of the others, I'd have to say that it's the front runner.
I know I definitely want one that's will work with a handy update client comparable to Semagic. I sometimes update my LJ via the web, but typically, it's with Semagic. I just like having a client separate from the browser.