you don't have problems iwht your unibody mbp waking up? my notebook likes to wake up a lot but i think its b/c a mouse is still connected to the usb and i accidently move it. but then if i dont open the lid the computer will stay on and since its closed the vents are well not ventilating and the computer over heats and then i get the black screen of death.
I, unfortunately, don't have a uni MBP, but what you're describing is common stuff among all Macs. Any activity with USB devices during sleep mode either wakes it up, or causes similar problems to what you've been experiencing.
Just make sure you unplug all usb devices before putting to sleep and taking out the MBP.