looks like i was right- "glow in the light" white, indeed. on the left is your traditional realforce "white", like the one found in the indepedently-sold white set (XF0100KT1) and the white realforce keyboards. on the right is the new white set found on the ducky realforce keyboards (104UB-DK30/45S).
the new white has the "neon' feel to it that all of the old colored sets have, but because it's a white set it makes the colored sets almost feel dull in comparison. not quite sure if i like it, but too good of a deal to pass up (+ it has some slightly updated legends/winkey/appskey).
edit- oh yeah, they didn't really bother to update the spacebar color, so there's some huge contrast there too