DrivePop offers its DrivePop Unlimited 1-Machine Lifetime Backup
. That's the best deal we could find for a lifetime online backup plan. (We listed a two machine plan for the same price on Cyber Monday.) It features unlimited backup space, unthrottled bandwidth, "military grade" AES-256 encryption, and online streaming of music and movies. It's good for use on one computer.
Of note, DrivePop also offers its DrivePop Unlimited 5-Machine Lifetime Backup for $89.99, and its DrivePop Ultimate Plan Unlimited Lifetime Backup for $119.99. The Ultimate Plan includes backup services for an unlimited number of machines.