I've released the first version of Crackup, my simple solution for creating encrypted remote backups. Since I last mentioned it, it's been rewritten in Ruby (PHP was getting on my nerves). I've been using the rewritten version for my own backups for about a week now and I'm pleased with it.
Installing Crackup is easy as pie if you've got RubyGems installed:
gem install crackup
There's some very preliminary documentation (by which I mean basic command-line usage info) here. Real Soon Now I'll add some examples and a description of how the backups are stored so you can reverse engineer your backups in the unlikely event that I get hit by a bus, you lose your original data, and every copy of crackup-restore disappears off the face of the earth.