More than a week before the official public onsale for the show, tickets to see the highly anticipated Broadway musical version of Spider-Man Turn Off the Dark are already being listed on Ticketmaster Entertainment’s Web site. Click on the screen shot below to see a larger version of the image.

Tickets to the show, which features the direction of film auteur Julie Taymor and music and lyrics by U2’s Bono and The Edge, are slated to go on sale exclusively to American Express customers on June 24, according to the show’s Web site, and to the general public on September 12. Previews start in mid-January, 2010, and the show officially opens a month later.

Besides Ticketmaster, tickets are being sold on various secondary ticket Web sites, including on TicketNews’s parent company site TicketNetwork.

However, Ticketmaster is the primary source for tickets, and it began quietly listing the tickets this month, with no fanfare. The tickets are locked into a presale code system, presumably awaiting the American Express customers.

A Ticketmaster spokesperson did not respond to a request for comment.

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Ticketmaster has vowed not to prematurely list tickets for sale, a practice that TicketNetwork and others have been sued over by New Jersey Attorney General Anne Milgram. In fact, Ticketmaster has stopped the practice on its secondary Web site TicketsNow, which was part of a February settlement it reached with Milgram concerning the sale of Bruce Springsteen tickets.