w/o stem, with a cut steerer its between 3,15kg and 3,2kg inc axle of course.
also bear in mind the 08 888 chassi is post mount direct to 8" rotor position so if you run that rotor size, you dont need any adaptor (saves a little weight there).
as for whats new, to make it like i said, like an air 888 should be, first, to me the 888 always was the a bit burly but very plush and dependable of the top companies forks, also, because of how its made (open bath) it meant you had an easy way to adjust spring progressivenes through oil height, which is an useful feature that the other competing models dont have unless you say are very good at fiddling with boxxers or buy gorides two stage kit for the 40)
now for 08 the air cartidge now has a much better progression rate, which means two things, one is that the full 200mm are readily available, and that you once again can use the progression adjust features.
i say features because you can use the PAR to adjust mid stroke spring rate (depending on how different you set the pressures in the SFA chamber and the PART chambers, the par will be fully engaged around the first third of travel) and the volume adjuster (red dial that used to be for spring preload) to vary the bottom out resistance (virtual oil level adjustment).