An angle worth pursuing somewhat is Jamaican, since we've seen Richard Reid (the shoe bomber) and now the snipers from there. It wouldn't surprise me at all to see a link established between Jamaican crime gangs, radical Islam, and the Black Panther (Islamic) movement.But even then, that's just one small piece to the puzzle. When it all settles down some, we'll probably see a white supremicist, Aryan, Tim McViegh connection to radical Islam, as well.
Of course, it's no wonder that Al Qaeda has to operate in small cells that don't know anything about each other, lest they might start fighting amongst themselves!