Why not use blogs to become a virtual DJ? The latest blogging trend is to offer MP3 files to your readers, combined with commentary and useful links. The tracks tend to be obscure rather than from mainstream pop, which everybody knows about anyway. Copyright status is often black or grey but so far the marketing has proven useful and these blogs have not been a legal target.
Could this be the future of marketing in the music industry? Here is an article on the phenomenon.
Here is one example of such a music blog.
The bottom line: Why don’t econ bloggers post their classroom and public lectures? Or short answers to public questions of the day? Hmm…