Sales of Blu-ray disc players haven't been helped by maker Toshiba's capitulation over producing the rival HD DVD format, research firm NPD Group said Wednesday. Toshiba announced on Feb. 19 that it would stop making HD DVD players, already doomed by Warner Bros. Entertainment's announcement Jan. 4 that it was dropping HD DVD to focus on Blu-ray. Sales of Blu-ray players, excluding PlayStation 3 ...