ask yourself this. The whole argument being put forth showing that Saddam was connected to Al Queda rests totally on if one- just ONE- person had possible contact with Iraq?
The training mentioned was with an Iranian allied Islamist group in the part of Iraq that was outside of Saddam's control due to sanctions. Zarqawi was against secular regimes such as Iraq and his whole philosophy is based on theocracy.
There's no doubt Zarqawi is a terrorist, that he is an islamist such as Al Queda. Here's a good read on how he's a seperate threat.
Weekly Standard
Tenet struggles himself to make the connection, stating that he cannot say there was a linkage but, without any substatiation, he assumes that due to Zarqawi being in Iraq in 2002 Zarqawi must be allied with Hussein, yet he also acknowledges he knows there is no "command and control" between them.
Of course, it's pretty hard to take any of our intelligence as well founded these days.....
The phrase "a shred of evidence" is pretty applicable.