Remember unlike .EDU or .GOV, a .ORG domain has no restrictions on registration. That means anyone can register a website with a URL ending in .ORG. Keep that in mind when evaluating information contained on .ORG sites. Many .ORG sites are used by reputable, non-profit organizations but .ORG doesn't necessarily indicate that the site is for a non-profit organization or that the information presented is reliable. If you're not sure do a little research on the organization.
If you don't believe it, go to godaddy.com or another domain registration site and see if yourname.org is available.