Found an incredible iPhone app called Flipstream private messaging based on sharing a pic… and getting one back.  It's essentially "I'll show you mine, if you show me yours."  Been using it with friends to chat, sext, flirt, and exchange pics.  All chat exchanges and images disappear (you just indicate the time you want them to last).  App also works well with friends.  Slick user interface and apparently, they've launched globally (available in English).

It's the TOP private messaging app in Singapore, New Zealand, Western Australia and the West Coast of Canada already.  It's only be out for a week!

The free iPhone App is available here: https://itunes.apple.com/us/app/id841052713

Website: http://www.getflipstream.com/
Facebook: http://www.facebook.com/GetFlipstream

Cheers!