Was Dubya wired for guidance during the debate?

Lots of speculation about the mysterious bulge in the back of his suit.

For example: this from Salon:

The latest clarification, explanation or evasion — depending on your perspective on all this — comes from White House Chief of Staff Andy Card. We caught up with him in spin alley here, and we asked him whether Bush was wearing a wire at the last debate.

“If he was, I didn’t know about it,” Card said. “I have no reason to believe he was wearing a listening device at all.” So what was that tell-tale lump under Bush’s suit coat? “I don’t even know what you’re talking about. Maybe people didn’t have very good eyesight.” Was the president wearing a bullet-proof vest? “No, he was not, not to my knowledge.” Some are speculating that he was wearing some kind of medical device, like a portable IV machine. How about that? “Not to my knowledge.”