I've come SCARY close to getting this done (late Halloween pun intended). At about 1:30 AM Central (US) (Before the time switch) I converted my first .DAT and woke everyone up by going "YES!" a bit too loud.
Still no textures in the build, however (Click to see why)
I DID find a snippet of code that I THINK converts the textures into UV textures, and if that's the case textures should be done within the week. If that's NOT the case, then you can go ahead and assume it's postponed for another Half-Life-3-o-cycle.
igga what did you say?