I think that a blog is a really effective approach to summarizing Vygotsky's theories and their implications. Outside of deciding on which blogging platform would work, content decisions need to be made. There has to be a reflection about how many entries the blog will contain and what points will be emphasized in the blog. Perhaps, a blog entry could be devoted to Vygotsky's life, helping to give background to what he was doing and the work he composed. The next entry could be basic elements of his philosophy. In this, discussion of the zone of proximal development, and to what extent independent learning can happen needs to be addressed. At the same time, being able to discuss implications of "meditation" in the learner and the construction of "inner speech" would be essential in subsequent blog entries.
I think that some entries can be devoted to Vygotsky's place in the educational pantheon with contemporaries like Pavlov and Jung. Additionally, it might not be a bad idea to examine how Vygotsky's theories mesh with a current education system that places so much emphasis on testing and high stakes assessment. Analysis as to this point could move the blog from a point of summary to a trajectory of making claims about the implications in Vygotsky's thought today.