Just to apologise if I do not do too much connecting through Mandeley (http://www.mendeley.com/). I am wedded to Zotero (http://www.zotero.org/) for citation management and Bibsonomy (http://www.bibsonomy.org/) for folksonomic tagging and bookmarking. academia.edu (http://www.academia.edu/) is starting to bubble a bit with social networking activity. And, of course Twitter. I wonder if Tweetdeck can read the Mendeley newsfeed?