A few weeks ago, I discovered pam_mount. This wonderful piece of software allows you to type in a single password, log into your system and mount all encrypted drives at the same time, by using the same password for your encrypted drive as your login password. While this makes your encryption password slightly less secure, as there is a hashed version of it available, it also makes it so much more convenient to use ecryption in the first place. If you would go unecrypted otherwise, it is definitely worth a look.