Our baseball team has a Shutterfly website which links to our pictures of little league glory, and are functional collaborative sites like Ning or Grou.ps, with modules for blogging turned to game reports, news items used for pitching advice, and storage of files like the team yearbook pdf.
UPDATE: The sciencephotolibrary replied to my inquiry:
Thank you for the email.
We have made our collection available through the Encyclopaedia Britannica Image Quest, which is an educational subscription.
This link is a pay subscription, so one would surmise that using the images violates copyright, though I believe since they are watermarked and available, an in-class use by teachers or students would be fair use (of course, only a court would say for sure). My posting them online is probably not.