Haha mine did this too, it was stuck in my buddys driveway for a whole weekend 'til I could get parts. You need to take apart the column, and swap in a new lock cylinder. Cost is just under 100 after paying saturn to have it re-coded and all that... (if you can do the labor yourself) Might wanna get a pro if you've never done one before.
They will send you a new lock cylinder and matching key. You'll have to remove the old one, which isn't impossible, but plan a good afternoon of swearing at it. Your old key won't start the car anymore, but I only use my key to start it, I use the remote for the trunk and doors.
I've got pictures, I'll dig around and post them up as soon as I can. It's not too bad.
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