There's nothing on the order form, but with the pre-order price on the 7900 ($3000 instead of $3500) and the recently-reduced price on the 990 ($1000, previously $1100) you're already down to $4000 - not bad when I would expect the combo price to be $4300 or so once the 7900 starts shipping. Of course, if you call or e-mail them they might be able to offer a combo price of some sort.
What speakers are you driving that has you contemplating the behemoth amp instead of a 7700 or 7500? After all, the 990/7700 combo is $2900 ($100 less than the 7900 by itself) and still gives you 200W per channel (300W at 4 ohms).