http://www.drownedinsound.com/community/boards/musicians/4184777

"We are currently casting a major international live event/show
to take place in London.

Due to the high profile of this job we cannot at this stage mention what this event/show is."

No, obviously, and you wouldn't want to let anything slip that might affect potential applicants' reaction.

"Overall the Talent must be free between July 09-March 2010."

Jacko, then.