Yeah... I personally have and use this one:
http://www.newegg.com/Product/Product.aspx?Item=N82E16813128663
But after using it, I can't really recommend it over an Intel solution. Memory compatibility in particular has been an issue, but that is likely down to my specific configuration. (My memory that works fine with Intel is unstable when the igp gets pushed hard on the AMD board). There are a lot more options with Intel, and their CPU's are better as well.
AMD's sockets themselves seem to be an issue on Mini itx. They have a noticeably larger footprint than Intel sockets, leaving less room for other components.
I sincerely hope AMD's mini itx offerings take a huge leap forward in their next generation of CPU's, because I like having options and am rather disappointed that there are no budget mini itx offerings for Skylake right now (as I've been wanting to replace my FM2+ board...)