Lots of excellent articles at Here's an interview with Michele Zanini, a security expert who makes some interesting recommendations about how the U.S. should fight these terrorists.
Some books which are rising the charts at in the wake of this disaster:
Twin Towers: The Life of New York City's World Trade Center
The New Jackals: Ramzi Yousef, Osama Bin Laden and the Future of Terrorism
This article at Yahoo indicates that names of suspected terrorists with ties to bin Laden were found on passenger rosters of the hijacked planes. But no name was given, just "a government source."
Another analysis of why the buildings collapsed, noting that the terrorists hit the buildings in the perfect spots. Any higher, or much lower, and the buildings would have likely survived.
In many ways, the people who built those two towers, and the buildings themselves, are heroes. The buildings held up long enough that many people could escape. This despite being hit by a massive 200 ton commercial plan. Then, when the buildings finally fell, they collapsed inward instead of toppling over onto surrounding blocks.