defrosting bread before slicing and toasting it (bagel, bun, muffins)
defrosting pizza before reheating in a pan to crisp it
heating dried shitake mushrooms submerged in water for an emergency soak and soften
hot lemon towels
warming honey to pour it out of a jar (don't do this with plastic jars)
hot maple syrup for my pancakes!
melt butter at 50% power so it doesn't splatter (yes, your power levels will vary. 50% @1500 watts works for me)
chocolate goes in my mouth before it'll hit the microwave
the chamber makes a great bread box when you're not using it
the chamber makes a great proofing box - power on for a few seconds to warm up the dough if it needs a boost
defrosting is the killer app for me.