While most archaeologists aren't impressed, the Solutrean hypothesis does have fans outside of the academic community. Predictably, it is very popular among white supremacists, who are fond of the idea of the original settlers of the continent being of European rather than Asian heritage. The Solutrean hypothesis is part of the white supremacist fantasy presented in the novel White Apocalypse by Kyle Bristow. The Solutrean foundation of America is also a key component in the rhetoric of neo-Nazi John de Nugent:
"The enemy of truth has a big problem with the issue of the Solutrean whites being here first and then the red man genociding him, for the whole story is didactic and instructive for white people today. It is the story of the first whites to build a great culture, and how they were crushed and died in slavery and agony after they became a minority in their own country." (source)
More discussion of the white supremacist embrace of the Solutrean hypothesis can be found in this blog post by Jason Colavito.
But what if those Solutrean people weren't actually white? Some new research that was presented at the American Association of Physical Anthropologists conference in St. Louis last week suggests just that:
"The modern humans who came out of Africa to originally settle Europe about 40,000 years are presumed to have had dark skin, which is advantageous in sunny latitudes. And the new data confirm that about 8500 years ago, early hunter-gatherers in Spain, Luxembourg, and Hungary also had darker skin: They lacked versions of two genes--SLC24A5 and SLC45A2--that lead to depigmentation and, therefore, pale skin in Europeans today."
If correct, that would mean that the Upper Paleolithic peoples of Spain and France - our friends the Solutreans - had dark skin. Does that put a chill on the love affair that white supremacists and neo-Nazis seem to have with the Solutrean hypothesis?
The quote above is from a news story on the Science website -- I'm not aware that the primary work has been published yet. I'll look forward to reading it when it is.