I already presented links on eraser carving, but perhaps you want to go a step further and make stamps from your own photos?
I found a tutorial on how to prepare your photos for carving stamps.
The preparation of the photos is similar to the tutorial on making your own digital stamps (and while we’re at it why not making stencils from your own photos? ;-))
On the picture you see a stamp template I made from a photo from a magazine.
Not yet cut, first I must find a big eraser ;-)
Here at unikatissima: