I thought Matt said they still follow no follow links they just don't use the link data in their algorithm.
Google's job is to organize all the information on the web. I am pretty sure they won't be leaving out this big and growing part of the web (ie the nofollowed part)
Blackhatters definitely rank using only nofollowed comment spam but it is in this honeymoon period that it usually works and eventually the sites get thrown out. I am pretty sure although not completely certain that as a long term strategy it is a no goer.