Woo! Maria-sama ga Miteru has been licensed by Nozomi Entertainment (Rightstuf International).
Official Site: http://maria-sama.rightstuf.com/
It'll be released in box set seasons (1,2,3), subtitled only, and the first season comes out on July 29th. The other two don't have dates listed.
I placed my preorder for Season 1 already, it was only $37.49, which means that two seasons cost about the same as one volume (two episodes) on Region 2 DVDs. An excellent deal.