Speaking to the NYT article that Rex linked is the Terror Finance Blog, 27 Nov 07:

Saudi Arabia Releases 1,500 Repentant Jihadists
On November 26, 2007, Arab News reported that Saudi Arabian authorities had released after their repenting of their Jihadist ways, approximately 1,500 “reformed extremists”. It went on to say that: “The committee has met around 5,000 times to offer counseling to 3,200 people, who were accused of embracing the takfeer ideology. The committee has successfully completed reforming 1,500 people." So who are these reformed extremists? The New York Times reports that of the estimated 60 to 80 foreign fighters who enter Iraq each month, nearly half of them are from Saudi Arabia. They arrive in Iraq not only with arms, but also with millions of dollars. Funds donated to the insurgents by private Saudi citizens as zakat. According to the Los Angeles Times, 50% of these Saudi fighters come to Iraq to be suicide bombers. Once caught by American forces they are repatriated to Saudi Arabia for prosecution......