The debut of Windows 7.5 Phone Mango approaches. Microsoft has, in fact,  opened  the doors of the Marketplace , which developers can start to send, via the App Hub , applications compatible with the update of the operating sisitema could be released within the next two weeks. New applications can take advantage of the benefits that may be made ​​from Mango including multitasking and audio in the background.The approximately 30,000 applications currently in the Marketplace will all be compatible with the update Mango. Source