Microsoft's MIX11 Day 2 is perhaps more important than the first. Today, Joe Belfiore took the keynote stage to discuss the next Windows Phone update, codename "Mango," which will be "available to all current users of Windows Phone" and on new handsets, he said. Developer tools are coming next month.

Microsoft plans to release Mango in autumn, adding support for 16 additional languages. The number of countries where Windows Phone apps can be submitted will increase from 30 to 36. Applications will be available to download or buy in more countries -- 25 up from 16.

Belfiore also highlighted changes specific to developers that "get more value out of your apps." User-specific enhancements will be announced later.

Among the new features is what Belfiore called a "jump list for apps," essentially the ability to use typographic keys to scan for documents. The feature could be a boon for end users with lots of apps and ensuring that developers' applications don't get lost in the mix. Search is improved, and Microsoft presents more information about apps in the Windows Phone Marketplace. Another new feature attaches apps as "Extras" to searches. Belfiore used example of Binging movie "Source Code," then watching the movie trailer from the IMDB app presented in "Extras."