Hello! I am sorry to hear that you also lose your important memory card data. Honesty, about a month ago, I did get similar formatted memory card photo loss problems and found most of them were needed in next day. So, without knowing much about data recovery information, I also followed some data recovery suggestions online and took chances with some memory card format recovery software. Luckily, after trying several ones of them, I eventually had recovered many useful photos back.
So, if you also need such helps still, my experiences may also help you:
http://en.wikipedia.org/wiki/Photo_recovery
http://www.icare-recovery.com/howto/sd-card-photo-restore.html
Or http://www.piriform.com/recuva
Hope these articles can give you useful data recovery clues.
