So I have built a pair of wheels using D-Light spokes. Here in the UK the only stockist I found was justridingalong.com (my LBS would have got them but only in boxes of 100). The wheels are for my disc road project and consist of Velocity A23 rims with non-machined brake track and Novatec D711SB / D712SB hubs.
The spokes came in about £1 each, are black, and have been easy to build with, not as fragile as Lasers. They weigh about 5.5g each in my selected 292mm length, not including nipple. One peculiarity is that the butted section begins within the threaded end so you can actually screw a nipple right onto the spoke, they don't get blocked. The spoke will be very tolerant of being too long for a particular build therefore. Couple of snaps below.
16 spokes, 87g
Close-up of threaded end: