Here is a quote from yamahasynth site(address below):

"Yamaha's first product to support this new system (OPT) will be the SQ01 sequencer, which is bundled free with the Yamaha S08 synthesiser and will be included with future hardware from Yamaha."

So XGWorks 5.0 will be called SQ01.....
the link is http://www.yamahasynth.com/pro/opt/index.html

DudeManCentral