This thread gives me an awesome idea for an encounter.
A shield guardian designed to hold a tiny wizard, or a skeleton with turn resistance that the wizard controls while in the skull.
Either way the party that meets the wizard and his "mount" will be extremely confused by the construct with the ability to smash and cast in the same round, or be frightened of the powerful "lich".
Imagine their surprise when they discover the tiny mage inside.
You know, with a little tinkering, the spell animate object could be useful for getting around.
good luck, and let us know what you come up with.
L.