A fan made a good effort to get some beta news from @Diablo today. And got rejected, but it was a good try.
Straight up – How long until the beta begins? How much more work is left before it is able to be beta tested?—AcidReign87
Straight up we’re not ready to make any announcements. —Diablo
We were told to expect a beta announcement during the next quarterly Activision/Blizzard conference call, which should take place… fairly soon. Early May.