Funny you should say this...that's what the media has been fed but the truth is far more sinister. Without going into details I can tell you that the mentality in the Lackawanna Yemeni community is what is called a beehive mentality. It is united by blood ties you wouldn't believe. And with the spread of fundamentalism it is even more bound up with extremist Islam. After all, Osama is one of their own - a Yemeni father.
No, the cell was not discovered with Muslim help. Far from it. Local Muslims have united behind their "good boys" and combined with the local left wing academics and peaceniks are putting up a good defense.
I'll put it simply for you so you can understand: when 9-11 happened, there was jubilation in Lackawanna.
I will give you this: the only muslims that can assist the US are those who have escaped Islamic regimes bent on Arabization and extermination by rival sects (Shia vs Sunni et al and the mess with the Baathists). But the US would be mistaken to trust them 100%.