What's the idea behind this? Is it basically using a "sneaker net" method where you send a signed transaction, carry it over on a flash drive, and receive it on an internet-connected computer? That's my understanding of how it works, but I'm not sure if I'm correct about that.
Yes. That's how it works. Done it myself.
This is nice documentation:
https://bitcoinarmory.com/using-offline-wallets-in-armory/
Thanks for clarifying. I've read the documentation, I just don't have a second computer to test it out with, so I just wanted to make sure I understood how it works properly.