My Hoya pubicalyx “Red Buttons” seedlings now have their first real leaf.  I will be transplanting them tomorrow, and will post photos soon.  My H. heuschkeliana seed pod burst two days ago.  I was able to plant around 15 seeds.  It will be interesting to see what comes of these seedlings.  The pod was on the yellow variety; but I keep both yellow and pink in the same pot.  It would be neat if there was a cross of some kind.  If the seeds are viable, it will probably take a year to make the determination.