This coming May 25th, Microsoft intends to unveil a more detailed and full roadmap for the Windows Phone 7 mobile line. Microsoft is working hard on the Mango update, which will contain IE9 and multitasking, its struggles to push out the comparatively modest NoDo update, which contains copy/paste capabilities, cast a somewhat dark cloud on the future upgrade cycles of the phone platform.

Article from winrumors: Microsoft to detail future Windows Phone roadmaps in May

Microsoft is  still working on the release, codenamed “Mango”, the software giant is  expected to brand it as Windows Phone 7.5 as an interim before the  platform is aligned neatly into Windows 8 and Windows Phone 8.

May 25th Event details, which is on Microsoft tech.days 2011, United Kingdom.

Enjoy!!!