Lioness will turn your now-useless Command-S muscle memory into an entertaining-and optionally useful-keypress.
Entertaining and Informative
If you can't force yourself to stop pressing Command-S, you can at least be entertained when you do so. When the free version of Lioness "sees" a Command-S, she springs into action, playing a sound effect of your choosing:
Lioness is also informative-if you've got Growl installed, she'll even tell you how many times your muscle memory has kicked in.
Of course, like any of our other programs, Lioness is loaded with features, including automatic update (so you'll always be current) and the ability to run as a regular application or as an icon in your menu bar.
As of now, Lioness is simply a demo that doesn't supplant manually saving your work. Once Lion ships, however, Lioness will be upgradeable (via in-app purchase, pricing not yet set) to a version that provides a truly valuable service when you press Command-S.
Instead of simply hearing a sound effect (which you can still leave enabled), pressing Command-S will cause the paid-for version of Lioness to implement Paranoia mode. In Paranoia mode, Lioness will:
Paranoid mode will also support similar live backups using Backblaze, Carbonite, CrashPlan, IBackup, JungleDisk, MobileMe, Mozy, MyOtherDrive, or SugarSync.