If, like me, you need to be reminded to read stuff, here's a reminder that the Research in Learning Technology Journal has new articles. This topic of social presence is dear to my heart so I've copied the link here http://www.researchinlearningtechnology.net/index.php/rlt/article/view/19710
But you can read updates from the journal via the link on the left hand html Journals block on the Rauemi page, or contact the journal editors and have regular updates sent to you.
Always worth a skim read at least.