The set is still going through the prototype stage. I haven't yet settled on a size for the graphics I am ready to approve as final. SP makes a sample, emails me a photo, and then I ask for a different size, etc. Currently I have only seen the first sample (the same one I posted earlier). I await the next size iteration from them.
Once we have decided on the final size of all the graphics, SP has to make a full set and send it to me so I can make sure that the graphics on every key are positioned properly and don't have any color issues. If there are any problems, then fixes must be implemented (either in my graphics files or in their dyesub settings), and we try again. When I get a complete set that I am happy with, then SP can put it up for sale.
This sort of thing is (typically) a time-consuming, iterative process. Let's also not forget that G20 Semiotic is not the only keyset SP is working on right now; we only get a modest slice of their available time.
With the Christmas holidays approaching, I expect G20 Semiotic to be ready no sooner than January.