eric peterson wrote:
what I did in a similar situation was put key in switch and then hammer in a screwdriver next to the key which gave me alot more leverage. then I put vice grips around the top of the screwdriver handle and viola it turned. I promptly drove it to my mechanic and had him replace the tumbler before turning the key to the off position.
Just FYI -- I believe once you've gotten the key to turn, you can remove the tumbler and drive the car without it by turning the ignition switch with a screwdriver. Might be handy if you can't take it to the mechanic right away.