I spoke to a salesperson on the phone and they seemed to imply that none of the current 10%/15% coupons would work with the $60/80 off (it's actually $80 instant savings on the 2007WFP, not $60 it was $60 until yesterday-ish though), though I honestly didn't see why not - I may have just misunderstood them.
Someone on this forum used a coupon before the $60 off kicked in, then successfully had a $60 credit added on afterward though.