Twitter offers 2 kind of photosharing service
http://tweetphoto.com and http://twitpic.com
On tweetphoto you can see how much views was on your photo and how much votes the photo got
You can add to your tweetphoto MySpace and Facebook account and you can buzz any fresh uploaded photo. It is possible to add url of your site in the Message text area. You can add tags to your photo as well.
In Public Social Feed you can see photos uploaded during last munutes
Twitpic is a little bit simple. You can configure your setting so that will be possible to send your photos to Twitpic via your own twitter email
In Public Timeline you can see photos uploaded during last munutes
Both of sites is way to increase traffic to your site.