I'm using my blog to host a couple pictures so I can post them over at Two Peas. There's a thread about showing the oldest picture you have.
The top picture is my great-great grandmother on my mother's side, with her two sisters. (Great-great Grandma is the one on the left.) I believe this was taken in the late 1860s.
The bottom picture is my great-great-great grandparents on my father's side, and it's a metal tintype with the color painted on. I think this one is also from the 1860s.
I have lots and lots of old pictures, but I think these two are the very oldest.