My suggestion is before you do anything, see how your labor is going and both of you are feeling. You may have a change of heart about posting. We did a few mass text messages to keep people posted. I was in almost 40 hours of horrible labor, and wouldn't want anyone to see me go through all that pain.
My mom asked me to make a tumblr so she could go back and look at the pics/videos whenever she wanted. It works for both of us because its quick and easy for me to upload its and convenient for my mother.