Mazda 3 Gear Shifter Repair (Stuck in Park) | More info
This video shows how to get your car into gear if the shift lever gets stuck in park.
By the way... the fuse kept blowing because the horn was bad. The horn and the shift solenoid share the same fuse. I replaced the horn and haven't had a problem since. The horn is behind the front bumper and you have to get to it from underneath the car. It's a PITA to replace. If you want to keep from having to replace the fuse over and over, just don't use the horn and don't hit the "lock" button on the key fob more than once.