Joined: 01 Jun 09
29 Sep 10 3:21 am
Many do say that the domain name is no longer as important as it once was, that the quality and relevance of the content on your site matters so much more, and that would mean that not having a .com on your domain isn't exactly the end of the world SEO-wise :)
Originally, the .org tld was intended for non-profit organizations or organizations of a non-commercial character. But, like rome9t9 said, there are now many .org sites which are commercial.
So I would say go for it, too.