This story says that the 9/11 Commission was indeed told of the July 10, 2001, briefing on al Qaeda, attended by Condi Rice. Money quote:
In the briefing, Tenet warned "in very strong terms" that intelligence from a variety of sources indicated that Osama bin Laden's terrorist organization was planning an attack on a U.S. target in the near future, but didn't provide specifics about the exact timing or nature of a possible attack, or about whether it would take place in the United States or overseas, said the former senior intelligence officials, all of whom requested anonymity because Tenet’s presentation was classified.
However, said one of the officials, "the briefing was intended to 'connect the dots' contained in other intelligence reports and paint a very clear picture of the threat posed by bin Laden." The CIA declined to comment.
The 9/11 panel, however, never asked for additional information or mentioned the briefing in their report.
Now we also find that Woodward's claim that Rice was indeed briefed as well is backed up by White House records. What happened in the meeting is, of course, still disputed.