A good question!
I looked up the domain on a who is site(no link since it leads directly to personal info)
Legally, I think you own Amiciveloci.org until the renewal date (maybe a lease is a more approraite term)
Noticed that it said "client transferred prohibited", which probably means you cant move to godaddy.com.
I would contact Yahoo! and see what's up. I think you should be able to have Yahoo continue to host the site, but I'm not an attorney and I don't know what kind of agreements you signed.
PM me, But I'm not sure If can be of much more help