Will have to double check our Madone at work, the brake clearance can probably go up to 28mm, but it's more the clearance on the seat tube, and chainstay that's the main culprit.
I strongly doubt 32mm will fit, mainly because it's pretty fucking big!
I bought frameset only; I use narrow rims with 25c tyres atm with loads of room. Will go wide at some point when these die.