Mango once again said to be WP 7.5, more details coming during REMIX 11
This gives further credibility (though we are not sure that it's needed anyway) to the notion Mango is Windows Phone 7.5, despite Microsoft's silence on the matter.
All these numbers aside, REMIX 11 is another platform where the Mango update will be discussed. The event will take place in Sydnes, Australia on June 1-2.
source: REMIX 11 via WPCentral