Just read the article you pointed to Jellyjam.
OPINION (based on cybersurfing only and no hard facts involved with this opinion):
Al-Zawahiri - alive.
Mullah Omar - alive (and negotiating?)
Zarqawi (with a bunch of akas on the spelling of his name): alive, but injured and possibly paranoid -- evil to the end.
bin Laden - His propaganda is still alive. He may or may not be alive -- hard to tell.
I agree on all four. (I think both sides, ours and al-Qaida, perpetuate the bin Laden myth to benefit each other's cause.)