I'm not sure the process is that simple- Since there are presumably interviews and the Mountain View meetup, YC is probably only looking to send out emails of groups that are absolutely no longer being considered. Also, I'm sure that certain groups would appreciate some anonymity if they are moving on to the next round.
also, (your announcement on email addresses has already been buried) some of the posts can be announcement posts and not scroll down - oops! becoming like a traditional newsgroup.