I've also ben using my Athlons as space heaters for quite a while now, especially my oc'ed T-Birds were good.
But to fry eggs on it, that's new to me. Finally someone made such a project, I bet there's more people than me who thought of this potential for a long time but were too scared to try it.
"Hungry? Want a fried egg? Just a sec, I'll get my computer open."