"No news," said reigning world champion Jorge Lorenzo today at Silverstone regarding when Yamaha will race debut their version of a seamless transmission.
Honda has used a seamless transmission for more than a year in MotoGP and has kept its details secret by controlling access. Each team that uses it has a special transmission technician and he alone works on it--with no one else on the team able to work on or even look at the bike when the transmission is open. Few details beyond those included in Honda's patent records are known about it.
Yamaha continues to work to bring their seamless transmission on-line, but with the potential for failure being potentially catastrophic--consider a locked transmission at speed--progress has been slow.
This isn't the first time that there has been a disparity of technology between the two MotoGP super-powers. Remember the days when nearly every other MotoGP bike on the grid used pneumatic valves but the early RC211V did not?