Is it permitted to use these photos on our own websites, e.g. in news items about the conference?
not without Doug’s permission
Thanks for the interest. I make all of my Flickr photos available under a Creative Commons “Attribution, Noncommercial, Share Alike” license. In a nutshell, that means they’re prohibited from commercial use, with derivative works by non-commercial users only under another such license, with attribution to me as their originator.