Laptop Lifts are by no means a feat of engineering, but they will let spilled milk glide right under your computer while providing some additional airflow.

Essentially adhesive, rubber strips, you wipe your laptop's surface clean and then you just peel and stick your way to a few glorious millimeters of clearance. They run $17.95 shipped, which is probably a few bucks more than your clever DIY solution, but you get six pieces of various sizes so you can probably treat a few electronics in your home. [Laptop Lifts via bbGadgets]