Just received this clarification from Kodak:

"The technical datasheet for Kodak Professional Supra Endura Paper mistakenly did NOT include the word rolls, leading many to believe that both rolls and sheets were being discontinued, when only rolls are being transitioned on a stock turnover basis to Kodak Professional Supra Endura VC Paper. We will continue to be offering Supra Endura in sheets at least into 2010."

That last phrase is a less than ringing endorsement, of course, but I did ask specifically about 2010, since the datasheet said production would end in 2009.