Blue Moon was purchased by Avalon Publishing Group and while the books are part of their catalog, I couldn't find any calls for submission or writer's guidelines for them.

For the most recent list of calls for submissions & publishing opportunities in the erotica market, visit the
Erotica Readers & Writers Association

http://www.erotica-readers.com/ERA/G/G-Main.htm

If you join their e-newsletter, you'll get up to date submissions in your in-box.