ETMP paper

I've just sent my paper for the ETMP conference off to the organisers. I felt quite constrained by the 5000 word limit and the need to do quite a lot of expository work. As a result I'm not sure that I made my argument in the strongest way. I think it's the type of paper that is best given as a conference presentation, by which I mean its aim is more to start discussion (and get feedback on issues that interest me) than to make unassailable arguments. The organisers are going to distribute the papers to all participants prior to the conference, but for anyone else who is interested, I've published it on Google Docs here.