There's a bit of talk going around about people being invited to create Battle.net accounts and the quarterly investor conference call. Blizzard announced that their conference call this year to investors would be streamed over the internet. Fans have taken this info and are running with it as hope that it's some kind of beta announcement or something. While we hope to get a glimpse or hint to the future, Blizzard PR would likely not let that be the way the announcement happens. To announce the beta, Blizzard would do something awesome, like update Starcraft2.com with a new section of the site with a beta FAQ and all kinds of things of that nature.
Who's to say this won't happen during the conference call? Well, really nobody. It's always possible I suppose, but I wouldn't bet a dollar on it. Blizzard knows it's gaming community, and while some are in fact stockholders a good portion if not most probably aren't. Am I saying you shouldn't listen to the call? No, of course not. Last year Blizzard confirmed social networking features for Battle.net during this conference call.