Ok, lessoned learned. Notebooks run hot. I placed my laptop on top of a book with a waxey cover (my copy of "Labrador Retrievers for Dummies" and it started melting the wax on the cover. Fortunately, I picked up my laptop before things got out of hand but there's a nice little burn mark on the cover.
So, just remember to be careful where you place your laptop when it's powered on. Not all flat services are safe.