Can't say socks yet, because there is as yet only the start of one. But soon there will be another.
I'm using Cat Bordhi's Ridgeline architecture for these. I like Riverbed too, but have found that the Ridgeline seems to fit my feet a little bit smoother.
Once I finished the standard toe increases, I started the quilted lattice pattern over the "central" 15 stitches of the top of the foot. This was well before the expansion increases, but I wanted to start the pattern asap rather than waiting until halfway up the foot.
I have started the expansion now, and it's going smoothly. Just have to remember which rounds are plain and which are pattern for the center and which are increases. Once I get past the heel, I'll decide what to do up the leg. I don't want to go with the full quilted lattice, but I may but one mirroring up the back and do a line of ribbing between. Or something. I'll make that up as I go.
Oh yeah, the yarn is Plymouth Yarn Happy Feet DK. I'm working on #2 bamboo dpns.