Reader A.T. writes:
When I can't sleep, I go onto TED.com. I'm watching a talk by Pinker and he says syllabuses at one point (about 15:36). Not sure if you've blogged about syllabuses versus syllabi in the Language Log, but I think it'd be a pretty cool topic to discuss.
I'd say "syllabuses" as well, though I can't recall the last time I had occasion to use the plural form.
The thing is, the word is a fake to start with, a misinterpretation due to scribal error. Here's what the OED sez:
So if we were going to be etymologically exact, the singular should be "sittyba" and the plural should be "sittybes", or something like that. Why should we invent a fake Latin plural to go with the fake Latin singular? My advice is to stick with plain English syllabuses.