The rumor mill on Zarqawi is 24/7. One possibility, is that he's already dead, maybe for sometime now, so a continous flow of rumor's about him put out by his closer associates that know the truth keeps him 'alive' to keep up the morale of lower minions. More likely though is he is wounded and hiding out somewhere in Iraq still, but I'd bet most of the info we get is nothing but rumor and any facts that slip by are probably months old. Who the hell knows anymore, all I do know is I will believe my eyes to his status when his stinking rotten corpse makes Fox news.
All of what you posted above could be true (or parts of it) - Though, I am being to suspect Zarqawi was never seriously wounded (if even wounded at all) - This is looking to be more of a rouse now than anything else -