Apparently someone at MSNBC got a case of happy fingers on the MSNBC ticker. It's been changed to reflect that it was relatives of Omar.
Which isn't to say that Omar is alive and well, either. Nobody has heard from him (that I'm aware of) in the last couple of days, and I'm not sure the Taliban would announce his death for fear of demoralizing the troops facing the Northern Alliance.
But this report is premature at this point.
US intelligence has confirmed that Mullah Omar is still in his emergency escape vehicle screaming, Varoom...VAROOM, in his attempt to get away, details at ten.