I read an interesting article on primate lineage in the NY Times Science Section this past Tuesday. Deric Bownds (Mindblog) posted a PDF version of the article here. Especially interesting to me is research on certain types of immediate/working memory tasks that finds chimps outperforming humans. One researcher believes that the evolution of the capacity for symbolization and language came with a trade-off entailing diminished immediate memory function in certain types of tasks.
In cognitive science, you have got to check out this post at Neurophilosopher's blog. It was reported that after shooting himself in the head with a crossbow, antisocial behavior ceased in a patient previously diagnosed with antisocial personality disorder. There's a nice picture of the arrowhead lodged in the prefrontal lobe. I guess it's a crude but cheap way to perform a prefrontal lobotomy.