I checked out Prada (the 5th ave store) and the sale is on! 30-50% off select items, although I couldn't find much for 50% off. I saw one of the robot tricks on sale. Not much left, as the Prada fans surely snapped up the good stuff early on, plus the 5th ave store is a tourist trap (was pressed for time and I can't bear to walk around the city when it's this hot).
I did manage a sneak peak into Barneys and they had a few select Prada bags (mainly nylons) for men on discount. 1 of each though. I spotted a nice blue nylon messenger with brown leather trim (which oddly was just on display at the 5av store) and a few others.
Comme des Garcons boutique - 40% off
Jeffrey - 30% off (AlexN, fantastic Dior Homme boots alert)
Yohji Yamamoto - 40% off (Softie, that Y's cardigan is waiting for you)
IF boutique - 30% off (excluding Carpe Diem, of course)
Helmut Lang - 30% off main line, 50% off denim, 65% off past collections.