Our most recent paper of the Enhancing Neuroimaging Genetics through Meta-analysis consortium was just published in Nature Neuroscience. We identified 7 loci significantly influencing the structure of the human brain, some near very interesting neural genes (IGF1, FOXO3). Most interesting is the genetic correlation between intracranial volume and adult cognitive ability - the same genetic variants that influence the size of your brain also (in part) influence your cognitive ability later in life! Pretty exciting functional impacts of structural differences.