Don't know what it refers to but the binary in GW's latest blog post ([url]http://www.games-workshop.com/en-GB/blog/blog.jsp[/url]) means "Ordinatus Ulator incoming!" - hopefully someone has a clue what that refers to.
(the original binary is 00100000 01001111 01110010 01100100 01101001 01101110 01100001 01110100 01110101 01110011 00100000 01010101 01101100 01100001 01110100 01101111 01110010 00100000 01101001 01101110 01100011 01101111 01101101 01101001 01101110 01100111 00100001)