The new startup Mosoto is putting the last years released API from Facebook to good use. Mosoto is a Flex 2.0 application that sits on top of your Facebook account via
the API and allows you to share files, chat with friends, and discover new ones. The chat client controls most of the action, listing which of your Facebook friends, friends of friends, and Facebook networks you’ve joined. By hovering over the names, Mosoto alerts you to the similarities between your profiles.
If you find someone that looks interesting, you can befriend and poke them right through the chat window. Chatting is one on one, with groups of friends, or even all of your friends within a network. The app has a desktop layout, where you control different mini applications for sharing files, chatting, discovering friends, and sharing music. From within the chat roster, you can share files with your friends using a free 1GB Box.net account. You can share and open files like pictures, songs, and videos using their in-browser file list and file viewers. The most interesting type of file sharing Mosoto does is with music.
Mosoto lets you upload songs into your Box account and string them together in play lists your friends can play through and remix. The music player lists all the music and lists your friends have, and lets you mix songs from your friends accounts into your own play lists.