My friend Anthony called me immediately after he had accidentally deleted 1300 pictures. And he was thorough... he also emptied his recycle bin. Well, I didn't have an answer for him, but he found a great one and shared it with me. I'm passing it onto you:
www.recuva.com
It's Free, easy, and he was able to retrieve all 1300 pics within a few minutes.
Don't Delete your Pictures!