I just put a pair of vice grips on mine and jerked it out.
Followed Booger's lead: grabbed the knob with rubber grip gloves, both hands, and it came out. Yup: it was bent all right. I straightened it out, lubed it up real good with graphite lock lube, and now it works fine. I'll be more careful from now on with the gashole...that's where I bent it, no doubt. I also cut a spare key, then cut it to fit into a small radio knob. Cemented the key into the radio knob with JB Weld. I'll leave this new "radio knob key" in my seat lock...looks like any other knob to the untrained eye. If I get worried about security, which is a very rare occaision, I can just pocket my hide-in-plain-sight hidey spare.
Thanks, Booger!