Nothing yet. Waiting for official Intel linux image to come out.
Yeah, that is what I thought. I am currently using a version of UbuntuMate from a Bay Trail. It is working with everything except Audio. I hope it is released soon.
I would recommend that you check on the following post: Ubuntu LiveCD for the STCK1A32WFC (Windows).
It could be useful based on what you want to achieve but keep in mind that Intel is not responsible for any content outside Intel's website and again here is the official information about validated Operating Systems for Intel Compute Stick: Intel® Compute Stick — Supported Operating Systems
I actually have UnbuntuMATE running on the Quanta Stick. The only thing not working is Audio. I used these instructions and it worked. I wiped out Windows but it functions.