Not Neandertal: Genome from fossil fingers a new, recently extinct human
http://www.scientificamerican.com/blog/post.cfm?id=not-neandertal-genome-from-fossil-f-2010-12-23
Actually this shows that the survivors of the 12 colonies may have arrived more recently that 250,000 years ago. And also inter-married less widely with the resident human population that intimated in the final episode of Battlestar Galactica.