I found this article by David Vienna very interesting.  It talked about posting pictures of one's children online.

Eric and I had made the decision before our daughter's birth that she would not have an online identity.  We just didn't feel, for us, that posting pictures of her online was the right decision.  We do share pictures with family through emails and texts; they know our wishes about not posting her online, but we just have to trust they will respect this.  We don't see anything wrong with people doing so, in fact-I love being able to watch friends' children grow up through the pictures they post, it just wasn't right for us.

I was hoping to read this article and that I would come away from it feeling that yes, we made the only correct decision there is, or that no-there is no harm and we should start sharing her with the world as proud parents.
I have to admit, as unlikely as it seems to happen, the example in this article about the little girl's image being used for someone else's family was the reason I didn't want to start posting pictures online.  You never know who is seeing them, and what their intent in viewing them may be.

I walked away from the article feeling the same way I was before reading it.  There is no right or wrong decision.  There is only the right decision for you.

(this was the solution for David in posting pictures of his children.  He only posts obstructed or partial photos of his children)