Since I’m already being paranoid with my backups, I figured a little additional offsite backup for the really critical stuff couldn’t hurt.
The simplest solution is often the best:
I’m storing a copy of my important MySQL data (my Tasks Pro™ data, the data for this site, the King Design site, etc.) and my SVN repository – looks like it will likely be a few bucks a month ($.07 bill for transfer so far). Totally worth it for the peace of mind.
UPDATE: A full transfer later, my bill is up to $.29. Awesome.