Thanks for this Bex, it's always good to get references to this sort of material. I have had a research blog since Nov 2008 and see it as a way to strengthen 'the researcher as research instrument' that is me. I wrote a guest post on thethesiswhisper.wordpress.com blog a couple of months ago on social media and the phd and there are a few more references in that. See http://thethesiswhisperer.wordpress.com/2010/08/31/social-media-and-your-phd
Thanks for posting this Heather, I found it useful in clarifying what is/isnt theory, and differentiating between theories that get referred to as weak or strong
Research project on using CHAT, Cultural Historical Activity Theory, in a project about library programmes, showing the steps in using the methodology.