Using GPG with Gmail to Become an Ubuntero

Encrypting and signing email has its advantages. Linux has one of the best digital encrypter/signer. It's called GPG (Gnu Privacy Guard) and is solely text based, though like apt-get, there are front-ends which aren't entirely necessary (including SeaHorse). GPG can be used to encrypt files, emails, and text. It can also be used to sign documents, that is to show that the email, document, file, or whatever did actually originate from yourself and was not tampered with before the recipient received it. How does that sound?