Phoja is a free „social photo discussion“ service,

where users can share photos and discuss about them with the rest of the community.

You may post photos on Phoja from the web site or your mobile phone. The photos can be about something interesting you saw, something you need advice on, and even something amusing. You can also post photos taken from your mobile phone camera or a digital camera, along with a relevant question, and seek advice from other like-minded Phoja users.

JuiceCaster lets you meet new people, connect with friends and share your photos and videos directly from your mobile phone. Instantly post videos and pictures to your Myspace, Facebook and other sites

Share Mobile Pictures and Videos

Instantly share your camera phone pictures and videos from anywhere, with anyone you want – send them to your friends‘ cell phones, MySpace page, Facebook, blogs, and more, right from your phone

List of social networking websites is a nice found on wikipedia

via Klaus Eck (on Twitter too) or take a look on hims blog