For a better part of the day, users have been unable to access their Battle.net User accounts. The reason for this was because of standard maintenance over the past 5 hours.
And it wasn't just maintenance. They have finally integrated the new Battle.net Balance system and brought it online today. EU will be next tonight.
Unfortunately, the new changes are still broken. The US Account Page links to the European Battle.Net Balance FAQ instead of the US one and the Battle.net Balance instruction page still has the incorrect URL.
So far, there has been no official announcement about this new major feature addition.
The first time the "new" Battle.net Balance feature was announced was December 9, 2011. When Blizzard revealed the new feature they said that it would be "Coming Soon" and rolling out within the weeks ahead (end of December). It has finally been implemented, but 10 weeks later.
* UPDATE: It's been about 1 hour now, and still no official announcement. I guess they're waiting for it to be rolled out in all regions first.
* UPDATE: 4:30PM now.. most of the managers will be heading home now so there's little hope of an announcement today. That just leaves the next few days.
* UPDATE: Finally! An announcement over two hours after the changes went live.