Bill'* right. We've only had one report of a cable failure on the front window. When it fails, the window drops down. Several have used the method above that Bill quoted with success. Others have been lucky enough to free it up by giving the interior door panel a good smack while depressing the button.
You'll have to take the door panel off, it'* just held on with clips, then peel back the water deflector, and remove the 3 bolts that hold the motor on. That should free things up. Using a good silicone grease, you may want to lube things up while you're in there.
Black 2000 SSEi, Silverstar Headlights, Angel Eyes fogs, 3rd brake light overlay, hi-flo cat, drilled 180 degree thermostat, Intense FWI, PCM, shift kit, and 3.4 Pulley. Solid front mount.