Windows Phone 7.5 Mango out September 15th. "We're rather a lot excited about Mango, which brings the Windows Phone platform some much-needed necessities, like visual voicemail, and also some next-generation luxuries, like baked-in Twitter support and a Hulked-up Bing. The release shouldn't be quite as fragmented as an Android software upgrade, but we also wouldn't be surprised if it's not immediately available for every WP7 handset, either." Read in full.