Blizzard has announced that the big beta patch will not appear until Monday, at the soonest.
Quick update for everyone! We’ve discovered a few issues with Beta Patch 10 which could affect player login. Instead of releasing the patch as-is and addressing those issues later, we felt it necessary to take some time to resolve them now. As a result, the soonest we’ll be able to release Beta Patch 10 is next Monday, January 23.
Thanks to Snipps for the tip.