summed up in all the other posts.

they keep calling ever 10 minutes

Special Olympics, presumably trying to cash in on the Winter Olympics in BC.

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.

"Or so they claim" is exactly correct.  you never know when you are being scammed.