My thoughts are:

360 did 850 or so week before so I think there was around 6k to 8k of unfufilled demand coming into current week

I therefore think that of the 30k shown on site only 22k to 24k was underlying sales for the week and the rest was previous weeks sales also being satisfied

I therefore think that 360 will drop from around that underlying amount to 8k to 10k

IU I think will drop to around 20k to 24k

360's Hardware will still be higher than the PS3's hardware numbers for the next TWO WEEKS!!!

As for software...IU (Infinite Undiscovery) will probably be cut in half.

IU=9k
360=9k

360 = 10k
IU = 15k

Well I used Blue Dragon for a comparative example. The following week the hardware sales saw a fifty percent decline, and the software sales were less then a quarter the following week. I think the bleed through for Tales, and the announced price cut will forge a fifteen to twenty percent rebound beyond that.

Hardware 18k
Software 18k

7k-10k 360

15k-20k ui

Xbox 360: 13,500-15,000 Units (Beating PS3 for the week)
Infinite Undiscovery: 18,000 (lower than ToV second week, but smaller drop than ToV)
Tales of Vesperia: 4,000

10k.