Mark your calendars and get your credit cards ready as the Zune HD will be dropping in just over a month. Thanks to a leaked Best Buy pre-order flyer, we now have a tentative launch date to accompany the rumored pricing for the Zune HD. Zero hour for Microsoft’s slick new portable media player is September 15th, a week later than previously reported. With all the pre-launch leaks out of the way, now all we have to do is wait for Microsoft to make these details official and see if the folks in Redmond can do so before those rumored iPods try to steal the HD’s limelight. Hit the jump for some more Best Buy Zune HD signage and a quick peek at the Zune HD packaging.