i'm pretty sure part of, if not all of his face was revealed in the agent x series. agent x gave him a whooping which broke his mask. at least the bottom of his face was showing then, and i believe his eye as well. i seem to recall him showing his entire face at one point, but i can't place it.
if i'm recalling properly, they were in the apartment, with sandi trying to comfort him. "don't blame yourself, yadda yadda." i haven't read it in quite a while, though, and may be somewhat off my gourd.
Avengers: The Initiative #8
(9th January 2007) (Writer: Dan Slott, Artist: Stefano Caselli)
Taskmaster is the new Drill Instructor at the Initiative. He downs a quarrelling Ant-Man, Hank Pym and Cassie(All Giant Sized) with a single shield throw. He then knocks out Pym by hitting the nerve clusters in his neck. Hank can feel the effects even after the unfortunate incident.
Taskmasters Tips to fighting Giants:
"There's one simple rule when fighting Giants. They have the same weak points as a normal-sized body...only bigger.
At this height your opponents' achilles tendons are over three feet tall-- and only and only an idiot could miss that big a target.
The same principle holds true for the nerve clusters in the neck."