United Notary Association of America

I think that they plan to use the .com  address only to re-direct to the .org address.

Exactly Tony. Any will direct you to the UNAA, however, the official webaddress is www.unitednotaries.org since we are a professional organization.
** .net--It was initially intended for use by network oriented entities such as Internet service providers. Currently, there are no formal restrictions on who can register a .net domain name. Therefore, while still popular with network operators, it is often treated as a second .com.

**.com--Although .com domains are officially intended to designate commercial entities (others such as government agencies or educational institutions have different top-level domains assigned to them), there has been no restriction on who can register .com domains since the mid-1990s. The opening of the .com registry to the public coincided with the commercialization and popularization of the Internet, and .com quickly became the most common top-level domain for websites.

**.org--.org was one of the original top-level domains, established in January 1985, originally intended for use by organizations that did not meet the requirements for other gTLDs. Now anyone can register a .org domain. .org was the domain commonly recommended for use by individuals, although .name and .info are now alternatives.

The above bits of explanation were taken from Wikipedia.
.org seems most appropriate for the association as the official webaddress.

Speaking frankly, I like the URL unitednotaries.org.  It gives the UNAA a more official look in terms of working for Notaries.

Hazza, you've done a good job with this site.