It was in the Guardian, here:
http://www.guardian.co.uk/september11/story/0,,1716841,00.htmlUnfortunately, it took the Saddam Hussein angle and didn't mention that 3 AA 77 hijackers had been followed "since Millenium and Cole".
My guess is that the 3 hijackers they (whoever "they" is) were following were the Al Hazmi brothers and Al Mihdhar. According to the 9/11 CR, they were only followed for about a week in early 2000, then the CIA lost interest.
One of them could also be Hani (maybe instead of Salem Al Hazmi), who was known to the FBI, as were Nawaf Al Hazmi and Al Mihdhar. AFAIK no intelligence agency was aware of Majed Moqed Al Harbi before 9/11, although his family is apparently big in Saudi Al Qaeda, which his cousin headed at one point.
The Cole bomber one of them associated with was either Khallad (operational commander) or Fahad Al Quso (supposed to video the attack, but fell asleep, was arrested in autumn 2000). Probably Khallad - the CIA and FBI apparently had pictures of him with Al Mihdhar (taken in Malaysia in January 2000).
Given the storm about the Downing Street Memos - "fixing the facts around the policy" - it is really strange that there hasn't been more action on this. I've only seen it blogged a couple of times, but it's front page news really.