C.P.
first, dont use that card to take pictures so it doesn't overwrite where the deleted pictures are.
I just googled 'undelete pictures' and here is one of the links:
http://www.cardrecovery.com/?rid=google&kid=cr2301
CardRecovery™ is the leading photo recovery software for memory card used by digital camera. It can effectively recover lost, deleted, corrupted or formatted photos and video files from various memory cards. It supports almost all memory card types including SD (Secure Digital) Card, CF (Compact Flash) Card, xD Picture Card, Memory Stick, SmartMedia Card, MicroDrive, MMC (MultiMediaCard), MicroSD, MiniSD and more.
here is the google link:
http://www.google.com/search?sourceid=navclient&ie=UT...
Good luck!!!