If you didn't drive it too far after it got hot, you may still be OK. It sounds like you blew a rad hose. That'* not necessarily a disaster. However, there may be underlying reasons, other than just an old hose that caused it.
Clean up things a bit and try to identify which hose failed. Based on the sounds of your situation, it shouldn't be too hard. Then go to the parts store and buy a replacement hose, a new thermostat and gaskets, and some new coolant.
As your engine has no doubt cooled off completely now, replace your thermostat, being careful to follow the instructions in TECHINFO and refill your system, again being careful to follow instructions to properly bleed the system as you refill it.
Let us know what you find along the way because the next step will be to diagnose what went wrong and find out if it was something more than just a failed rad hose.
There'* more, but let'* take things a step at a time.
EDIT: BTW, I just noticed that you have another thread asking about replacing a water pump. Since that appears more than a little related, do you mind trying to keep all this same issue in this thread? Do you have reason to know/believe that your water pump is bad at this time?
Mike: 1997 SE w/ 183K, aka White Horse
, Gutted Airbox w/K&N, drilled 180* t-stat, tint all around, clear corners w/SilverStars, "PONTIAC" light up tail, PEMs, NGK TR55s