3 links
Achievement Profile: Stephen Krashen
eslminiconf.net
Interview by Robb Scott from ESL MiniConference, with a picture and extensive links.
Books by Stephen D Krashen
sdkrashen.com
His official website, containing online texts of numerous books and articles.
Stephen Krashen's Theory of Second Language Acquisition
sk.com.br
Summary of Krashen's 5 main hypotheses on this topic. In English and Portuguese.