This article from the Dallas Morning News provides valuable if painful insights into the degree of confusion within the U.S. government over how to figure out who are 'moderate' Muslims and who are extremists and potential terrorists.
U.S. officials continue to deal with organizations like the Islamic Society of North America (ISNA). ISNA is linked to the Muslim Brotherhood - yet its president, Ingrid Mattson, spoke at President Obama's inaugural. Another senior ISNA official, Louay Safi, has served as a military instructor until recently, when he was suspended from working on military bases pending a continuing criminal inquiry. In fact, it's even worse: he has been runing the military program certifying Muslim chaplains for work in the U.S. military and prison system.
(Thanks to Zuhdi Jasser.)