What was being phased out? Do you mean that Google stopped sending sites to sup index? That would be nice I just checked one of my sites that was in sup a couple of months ago and all the pages are in the main index (all 3200+ of them). To me this is a clear indication that sub index is no longer alive - you might be correct. I used to do a search for site:yoursite.com in Google and if a page was in sup index, then it would have been indicated in the page listing details.