Could it be true?
Treat this as largely unsubstantiated until we get more confirmation, but the Jerusalem Post and several other Middle Eastern news outlets are reporting that:
"Top Bin Laden deputy Ayman al-Zawahri has been caught in Pakistan, according to a report from the region quoted on Israel Radio Monday."
I sincerely hope it is true. Bear in mind that this is another instance of where we snagged a middle man and several others fall. They may not officially announce the truth of this until they have completely fished-out the hole.