Microsoft is holding a special event on May 24 to show off the public-facing features of its first major update to Windows Phone, Mango. It's expected to include features such as built-in instant messaging, more advanced third-party app support, and more than what's been seen so far. Tune in at 10AM Eastern on May 24 through <em>Electronista</em>'s <a href="http://www.electronista.com/live">live coverage page</a> for details as they emerge.