Have you read Dale Drinnon’s recent blogs on “Migration of the Uralic Peoples”?
http://frontiers-of-anthropology.blogspot.com/2012/01/more-on-uralics-part-1.html
http://frontiers-of-anthropology.blogspot.com/2011/03/megalith-builders-red-paint-people-and.html
http://frontiers-of-anthropology.blogspot.com/search/label/Uralic%20Languages
http://frontiers-of-anthropology.blogspot.com/search/label/Solutrean%20Crossing
Also this one:
http://frontiers-of-anthropology.blogspot.com/2012/02/american-cromagnons-archaics-and.html