WPCentral reports that it seems that Microsoft is testing out a new build of Mango with Twitter enabled

The current "beta 2" build of Windows Phone "Mango" (see review) is a pretty sweet ride, if you can get it on your phone. But one area that is incomplete is the Twitter integration. In fact, when you go to add accounts, Twitter is listed but the setup screen has a "Coming soon!" button that is disabled. It also mentions that it will setup your Twitter account via Windows Live. So it's just a matter of time before Microsoft finishes that part of the OS--makes sense.

In the last few days a few more folks on Twitter have started tweeting with "via Windows Phone (via Windows Live)" as the tweet source. Clicking the link redirects you to Microsoft's Windows Phone site. This was similar to another build from April where it said "via Windows Phone(via Windows Live)INT". The difference there is of course "INT" which probably stood for "internal", as in development purposes. (Interestingly, a lot of those tweets disappeared once our site and others highlighted the fact that Facebook checkins and Twitter integration were likely coming.)

  Microsoft testing out new build of Mango with Twitter enabled?