Tuesday, December 2, 2014 6:50:00 PM
A few hours after my post, the store opened again, and the method to get the apps outside the "walled garden" is still working.
So it looks like it was a coincidence - real planned maintenance a few hours after a security issue.
On the CrackBerry forums xsacha opened uo the floodgates by releasing a way to download any app from the BlackBerry store on a PC, for "backup" or other less legit reasons.
A few hours laters, every BlackBerry in the world can't access anymore to the store, for planned maintenance.