I am an MS partner and cannot get answers to this. It seems you have to be a big corp with a back door into MS to get listed in the market place. Not sure why they bothered telling the public they will be able to create and sell assets when they clearly have no intention of actually letting 'the public' create and sell assets. Very frustrating. I have hundreds of assets I want to publish but have to sit by and watch other companies get a foothold in the market place. Downright anti-competative.