I think it might be late August or September before the iPod promotion starts again. I think it was about that time last year and it fits into the run-up to Universities starting in October.
Sayin that, with the possible update of the MacBook Pro and the possible launch of the new Power Mac / Mac Pro, I wish the iPod promo starts soon, as I'll be buying one or both of these very soon and one (or two) free iPods is good news in my books