According to AMERICAblog, the Pentagon has blocked Internet access to several LGBT-focused websites on the building's computers.
Towleroad, AMERICAblog and Josh Seefried's site all have been listed as "Blogs/Personal Pages," "Political/Activist" and/or "LGBT" -- categories that have triggered the Pentagon's access filter.
Contacts at the Pentagon, including including Zeke Stokes, communications director for OutServe-SLDN, tried accessing a variety of sites and confirmed that at least those sites were censored while Ann Coulter's and Rush Limbaugh's websites were not.
Apparently the Pentagon was notified of the LGBT filter, which existed before the repeal of "Don’t Ask, Don’t Tell." However, it still remains active.