Don't listen to this other reviewer here, thomasmarch - he's either talking about some other piece of software, or his machine has a serious problem... or maybe version 1.0.1 of Eversave really stunk. I just tried out version 1.0.2, and it's pretty nice: little icon in the menu bar, compact preferences dialog, easy enough to set up (although the instructions could be atiny bit clearer).

After Pages '09 screwed me up twice, crashing and taking all my unsaved work with it, I am a happy camper now, having found this software. Free, too. Cool!