Salute
Wished that you could lock your screen and start your screen saver with a three-fingered salute like our Windows brethren can? A wonderfully simple app that just sits in the background and waits for you to press ^⌘⌫. When you do, it asks whether you want to start the screen saver, Terminal, or Activity Monitor. Screen saver is the default, so just salute, press return, and your screen is locked (assuming you've set a screen saver password in System Preferences). Reclaim a hot corner for something else! Use Salute!
Tags: screensaver , shortcuts , lock , security




2 Opinions:
There are four hot corner actions for Exposé, plus two for screen saver. I don't have six corners on my monitor :)
In any case, if you have a password lock, an errant mouse move resulting in your having to type your password is highly annoying. You're probably not going to press three keys at once inadvertently.
Four screen corners is not enough?