Good work guys. I'm glad to hear that you're still making good progress on this. I still have my checklist of things that are keeping me on Azure, but I'm definitely keeping an eye on AppHarbor.
Good news. I've tried AppHarbor and it's really easy to deploy your .Net site. One quick suggestion though: don't make me log in to see your documentation.
My bad, yes I don't need to log in to view the docs if I go directly to support.appharbor.com. But from the main page, when I click "Support", it forces me to log in.