From Silius on the EQ2 Forums:
I just wanted to update everyone on the situation. We will be unable to get this fix live until Tuesday. Once again I am sorry for the inconvenience but I offer some assistance. If you are unable to get into the same instance please do the following:
1. Have your raid leader petition so their is only one petition generated for the raid.
2. Place the petition in the stuck character category.
The CS team is aware of this issue and they will do their best to promptly assist by pulling everyone into the same instance. There is no guarantee that they will be able to get to you quickly so I ask that you please be patient. While not an ideal solution, I hope that this is a satisfactory compromise and that you will extinguish your torches and lay down your pitchforks.