I just declined my offer from Michigan. I hope it helps someone in the waiting list. I would also encourage people not to wait until April 15 to decline offers, (if you have multiple offers, have done the visitation weekends and are more than sure you will not be attending one/few of them). this really helps the people in the waiting list.
I applied for PChem too. Heard positively from Madison(visiting Mar 12) and UPenn(visiting sometime in March). Rejected from Chicago. No words from Northwestern, Cornell, Stanford, Berkeley, MIT, Caltech, UIUC, Michigan. Looks like we have pretty much applied to the same schools.