Remember those Apple ads that said "There's an app for that?" ZipCloud is an online backup service whose motto may as well be a variation on that theme. The basic service does exactly what you expect, backing your files up to their secure Amazon S3 backend via the internet. But the experience is marred by the numerous up-charges. Want more versions, hourly backups, faster uploads, or support for large files? Yep, there's an add-on for that.