Now, if my memory serves me correctly, there isn't cross realm raiding for the latest tier of raiding? I thought this was posted before patch 4.3, but I might be incorrect. Can anyone confirm this? I have several friends from other servers and wanted to know if we will be able to raid together this Tuesday when the MoP raid is released.
No, Cross Realm raiding is only available for the previous teir of content. I will assume that Vaults will be available for Cross Realm once the other two raids are unlocked in a month, but that will be if they consider it as a separate teir as it will be 0.5 teir iLVL lower then the next two raids.