It appears that AMD is already shipping the upcoming Radeon R9 Nano to a select few modders and promoters as it has been spotted plugged inside MSI's X99A Godlike Gaming motherboard.
While there are no further details and the actual graphics card is not even running on that motherboard,
pictures of it comes from Flickr, posted by user Elmy, who is actually Anthony Lackey, which has done some promotions from AMD in the past.
The text below the picture says "Coming soon to a retailer near you...." and explains that the pictured graphics card is supplied for a project done for AMD which will be detailed later next week.
Back when most of the AMD Radeon Fury lineup was announced, AMD did not reveal a specific date for the R9 Nano launch and we only know that it should come in Summer, but apparently it might launch earlier than we expected, even sometime next week.
Source:
Hardforum.com.