By sheer coincidence, I have just been reading this on the SS forums:
"I just wanted to let you know that Corbis are giving all their photos away for free, if you sign up. When I say free, I mean web size photos.
I visited a web design firm today in Delhi, India and was asking what companies they use for getting photos. When they mentioned Corbis, I thought how could an Indian design firm afford Corbis photos. Then he just showed me how he logged in and could access all web size images for free. I was horrified!!"