The Harry Potter and the Order of the Phoenix soundtrack will be released on July 10th(I think I said this). According to page 8 of this article:

Warner Bros. Records will release the original soundtrack from the new Harry Potter film, Harry Potter and the Order of the Phoenix, on July 10. The album presents the original score composed by Nicholas Hooper, who was hired to score the film at the insistence of director David Yates, whose working relationship with the composer dates back to the early 1990s. The recording of the score began in London at Abbey Road Studios on March 19 and the orchestral sessions will continue next week.

Thanks HPANA!