Related social sites that are part of PublicLaboratory.org:
<a href="http://www.facebook.com/PublicLab">facebook.com/PublicLab</a>
<a href="https://twitter.com/#!/publiclab">twitter.com/publiclab</a>

Each wiki page also has "facebook share", "tweet" and "+1" links for you to share on your own channels. 

There is no community-wide Public Lab Flickr account: everyone uses their own flickr or other site for uploading pictures and then tags them in a particular way for easy searching. See Jen Hudon's example: <a href="https://www.flickr.com/photos/j-who/sets/72157625264749937/with/5176168622/">#GrassrootsNewark</a>. Also see RJ's note on how to <a href="http://publiclaboratory.org/wiki/how-add-images-to-your-notes-and-wiki-pages">easily embed</a> these images into pages and notes on this site.