I own a iMac 233, and it doesnt have deep sleep, it wasnt around then. It's sleep is just turning its monitor & hard drive off. Try unplugging/replugging the keyboard and see if it helps. Try zapin' the PRAM. And for these reasons I really think apple should provide a downgrader. There actually is such a thing as a downgrader whenever theres a 10.2.x beta floating around.