I have deleted some pictures I need back. They were not saved to a SIM card, just the device. Can I re-capture them???

Nope. Once they are deleted, they are gone. POOF!

they are not saved to the phones harddrive like a computer?

Wirelessly posted (The Dacia Sandero of data plan)

Nope. Phones don't exactly have a "hard drive" like computers. The memory type is different.

Thanks Trimix

What about any deleted emails? Ive lost some from Yahoo, but its not my synced email, using MS outlook for that.

There's software out there that will allow you to recover deleted files from memory cards, and that might work on the BlackBerry's internal memory, or added memory.