http://blogs.msdn.com/b/jgalasyn/archive/2011/04/13/windows-phone-platform-updates-announced-at-mix-11.aspxGreat new stuff coming in Mango. Here’s what you’ll see demonstrated at MIX ‘11 : Multitasking: The fast app switching (FAS) and Windows Phone background agent features provide a rich multi-tasking experience for apps. IE9 for Windows Phone: Additionalen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)