I had the same experience as William Black, posted on Sept 23, 2009. Some one from 206-866-1921 called and said they were with the Special Olympics, that this wasn't a sales call. (Yeah, right! How high do they want to pile on?) I hung up.
Using caller id, I called the number back and got a voice message that referred me to the 866-544-4880 number.
When I called the 866-544-4880, a woman identifying herself as Latisha Green answered. I requested I be taken off their call list. She asked if they could call me in the future, I responded, "NO! Take me off all your call lists." She said she would comply. I've documented the call for any future reference that might be needed.