Starting to write lectures for the coming semester today - for my Creative Industries unit [2]. Googling for convergence I found this OJR article [3] which seems to do a pretty good job introducing the concepts surrounding it - of course I found this only after my unit reader went to print... Still good stuff, and I might include it in a later revision of the reader.

Also very useful on the same site: the Who Owns What [4] listing covering the holdings of major media organisations.