Starts with Google themselves not having the Official Bumper in stock, The Wireless Charging Orb or even a Slimport HDMI cable. Then Case makers are dragging their feet on their cases as well. My guess would be they see Google struggling to produce enough phones to sell so they are all waiting for the user base to grow in order to put their products out for sale.
What accessories are you waiting for?
Me personally I can’t wait for the Androidified Clone Army Case if it’s even going to be made and a Slimport HDMI cable cheaper than the 2 options I found on sale so far.