Maybe I'm slow, maybe no one else has noticed..
But there's an awesome new feature on Google -- Google Scholar.
I've got access to a lot of scholarly sources through my work/school, but it's a pain in the ass to log into most of them. Google Scholar lets me search stuff like Journal of Pyschiatry, Neurosurg. Psychiatry, all sorts of awesome scholarly journals.
A search for "amygdala" got me 4.1 million articles from journals!
For any of you who read them often, I'd recommend it.