ClicKey is a Windows application that provides the necessary tactile feedback that the Eee keyboard lacks at times. The Eee keyboard, being small, sensitive, and too silent, sometimes lets you miss a few letters or even double-type in a couple of letters.
You can just download the app, and run it. No need to install anything. If you want this to run automatically, just drag a shortcut in your startup programs. My only gripe with this program is that it does not mimic an actual typewriter sound.
Download ClicKey here.