i was watching for the same deals as last years as well. i got tired of waiting and bought a kit from b&h. 2 600s a rt-3, 2 umbrellas, stands bunch of rechargeable batteries for $1300. the same thing was around $1150 last year i think.
i don't think the price is coming down soon. i don't know if you have any already? if you don't i would go ahead and get a couple. they work great and are easy to use.
I bought a 600EX-RT when it was on sale last year and have been wanting to add another unit or two.
BTW for the B&H bundle, were the 2 600EX-RT's and the ST-E3-RT in their own individual retail boxes with paperwork, or did B&H take all the units out and put them into one custom package?