Pownce is a way to keep in touch with people and share stuff with them. Send files, links, events, and messages to people you know and have real conversations about them.

Unlike the social networking sites like Orkut, you can send some files to your friends. You can send upto 100 mb of files, if you enroll into the pro version for as low as 20$ an entire year.

Pownce also has desktop software. Once you're signed up, you can just download it.