From Akil "Lyndro" Hooper on the EQ2 Forums:
I have an update! The actual fix is going to be riskier than we expected, and we want to take more time to make sure nothing explodes, so we're going to roll back the zones to the way they were until we can get the fix to live. We are aiming to have the zones back the way they were on Thursday.
Since I know it'll be the next question, the fix is going to function outwardly the same way things do right now. There are going to be a couple extra edge cases where you may get conflicting 30 minute lockout timers if you reset your old instances after the raid you want to join starts up their new instance. To combat those, we'll also be adding the ability to reset the 30 minute timers, as long as you haven't been locked to the zone (Which means it isn't a 30 minute timer anymore anyway).
Until the fix is in please don't exploit... Actually, even after the fix is in please don't exploit.
and from Kander:
So we probably should have explained this better. It was a quick band-aid to stop a major exploit.
This is a temporary fix, that is giving code the time to fix it correctly. We will have this changed as soon as possible, as soon as we can get it tested properly.
Shouldn't be too long.
Thanks for being patient and understanding.