The photo feature is still in Beta, sorta. As of this article there are 76,334 photos posted on Family Tree. I have placed 48 of them and looking to add more.
Invitations to join the beta are found at: https://familysearch.org/invite/photos/
PS: Don't use Windows Explorer when working with photos.
Currently only those with member accounts are being given access. This is a capacity issue. At 8AM each morning 50 new users are given access. We hope it is live for all soon. Only a couple of bugs in the helper button are keeping Family Tree from going live to the public.
This person has 7 photos uploaded.
By clicking photos at that point you are taken to a place where all photos tagged to that person reside (Illustrated Below).
You will be able to enlarge a photo by clicking on it:
Once You have access you can upload photos. You see them live immediately,but they are reviewed for following church policy before they are offically accepted. I had one rejected because it wasn't a person, it was painting by my great grandmother. Also, forget the swimming suit photo. Its a no go.
There was a webinar (poor quality) last week http://broadcast2.lds.org/familysearch/2012-02-30-familysearch-photos-step-by-step-guide-8000k-eng.mp4
and another this week. http://broadcast.lds.org/elearning/fhd/Community/en/FamilySearch/Product_Webinars/Photos_Tim_Cross_Feb_21_2013/FamilySearch%20Photos_Getting%20Started_player.html/