Via Boing Boing:
"The Wellcome Trust, one of the UK's largest medical charities, has released its image collection under Creative Commons licenses, with a new web site to search through it."
And what an amazing site it is! Check it out here. The site is quite slow, but well worth the wait-- a veritable treasure trove of amazing imagery. Hooray for the internet. Thanks, Megan, for passing it on!