On a related note, I also learned that if you accidentally burnt said spaghetti sauce (or anything) onto the bottom of a stainless steel pan, there is a scour-less way to remove it:
1. Put about a half-inch of water mixed with vinegar into the pan.
2. Bring it to a boil for a couple of minutes.
3. Simply rub off the charred food (no major scrubbing required!).
I don't remember where I heard about this tip, but it certainly did the job. :)