There is a very good blog on land value taxation at flip chart fairy tales by Rick. It sounds like the author has only recently come across the idea to he puts it very freshly. Te context is the present crisis of public finance and the need to reduce the deficit between public spending and income. It states the advantages and disadvantages clearly and surveys the extent to which the idea has political support. A good discussion follows the blog which contains a couple of videos and a link to a very extensive discussion of taxing land values and the underlying economics on the prison planet forum.
