I've just completed work on the prototype of what will become the main navigation system for myOSity. It all starts with a button - I call it the "You button" because clicking it will display a menu to everything that you care about in myOSity: friends, applications, files, and preferences. The styling is very basic right now, but once a real designer comes on board (hint hint, still looking!) I'm sure it will look really cool. Check it out!
The text on the button that says "Test", will actually display your name (it says "Test" because I took the screenshot with a test user account), along with your profile picture or identicon, if you don't have a picture selected.