So... I had the bad idea to put an unreadable SD card with a broken plastic corner in my GF1 to see if I could format it in the camera... and then it wouldn't pop out anymore. I had to pull to take it out. After that I inserted another SD card, a working one, and now there's no way to take it out either. It looks like the eject mechanism/spring is bent or broken or whatever. Anyone knows how the card eject mechanism works? I guess I'll have to take the camera to some repair shop.