While I was camping I got some nice footage and pictures with a 64gig (one of the SDXC ones for future) sd card in a Panasonic GH2.
I'll admit I was a bit stupid in just putting the memory card in, and snapping photos.
Currently the camera is reading the videos and images taken fine, so there would be no damage.
However plugging it into a Windows 7 based machine brings up a forced "please format this card" message. Is there an alternative way to mount it, or otherwise read the data before I properly format it?