That will be really helpful. I had to migrate from one WP install to another and I lost a bunch of content in the move because the WP export tools decided to be stupid.
I was hoping that IFTTT would have a recipe for self-hosted WP installs, but it seems like they can only get at wp.com blogs. I know just a little less than you on oAuth workflows, but I’ll see if I can figure something out. I think this would be a great plugin to have fully fleshed out.