public upload.

Hello. I am Directing a photo sharing site for a long time. In the mid way I came to wp platform hope that i would get my solution, but after many struggle i couldn’t. So i went back to my blogger. My problem is I want visitors can upload their funny photos from the front end, they don’t have to register. Their photos will be submitted for admin’s approval. And after approve it will be shown on the home page of the wp site. my idea fully came from http://lolhappens.com . though they need account registration. please help me out on this one. please