Here's a good site:
http://www.whatreallyhappened.com/wrh_9-11_index.html
Under the "WTC Collapse" link, there is video of the WTC-7 collapse. Plus quotes about Guiliani saying it was a diesel tank explosion, in opposition to a couple of guys who admitted it was purposely demolished with explosives because it was unsafe, in opposition to the official story of the fires from the main WTC collapse causing it. Did you all know that WTC-7 housed IRS records and (I think) certain FBI files related to prominent cases? Plus, that supposedly PCs recovered from the collapse showed hundreds of millions of dollars of illegal financial transactions right before the attack started?
There is also a good page for the Pentagon attack analysis. The guy who runs this page thinks it actually did happen (and has pic evidence posted), and the missile/commuter plane/USAF jet theories were floated to purposely make everyone look like *crazy* conspiracy nuts (as opposed to intelligent, thoughtful conspiracy investigators) and discredit them.
I'm not sure what I actually think - there are too many missing pieces, not to mention overlapping ones. And what if all this conspiracy info is bogus and intended as misdirection (see conspiracy nut comment above). I don't believe we've gotten the actual story, however, and doubt we ever will. Just like any other major scandal that has ever happened in this or any other country.