Note the first photo of Haswell NUC apparently depicts the new USB 3 logo, "http://vr-zone.com/articles/intels-haswell-wilson-canyon-nuc-smiles-for-the-cameras/35563.html".
FanlessTech indicates Haswell NUC will be out in September. "http://www.fanlesstech.com/2013/06/haswell-nuc-in-september.html".
Impactics D1NU1: Dads will have fun putting this one together Christmass eve. "http://www.fanlesstech.com/2013/04/impactics-d1nu1-unboxing.html".
We do not have information available until the product is launched. However, you may want to keep an eye on this page for future information -http://www.intel.com/content/www/us/en/motherboards/desktop-motherboards/next-unit-computing-introduction.html