In all these years I don't ever remember any sort of promo like that during the holidays. Typically Apple has a sale on the Friday after Thanksgiving which varies from year to year. Maybe it's on iPods, maybe on Macs, you never know till the actual sale, which is usually only 6pm to close. And usually it's not much of a sale. You won't see any other promos during the season. The free iPod with Mac promo has only ever been a back to school promo. They also do Perfect Companion $100 printer rebates, not sure if one is going on now or if they run that during the holidays.
Not worth the wait, and the EDU disc. trumps any sale promo etc. that you might get retail, esp. when you factor in the disc. on Applecare, HD bumps, Software like FCE HD, even RAM is stomachable at EDU prices.