Great post! I noticed your homepage has change since the last image in your post. Why did you choose to remove the "No Uploading. No Reorganizing. No Hassle" line? Also, how is the 'personal' picture working out for you?
"...what I found in our case was that trying to educate people on how our product worked differently was a loosing battle. Telling people they could share their photos and videos instantly and without any uploading usually resulted in one of 2 reactions. They either got confused or didn’t believe us. We instead decided to focus on a more general “finished story” benefit and ushered the user to experience the product for themselves."
Granted our audience is typically less technical, but this was the case even with technical folks when I described the service to them.
The "personal" picture over a screenshot tested a lot better and has worked for us.