This is great!
We've been unable to accept orders from any countries other than the US and Canada. The problem is a bug in our version of the storefront which we can't fix because installing the update means breaking other customizations we've implemented (and we simply can't afford to have those customizations done again).
After reading the article you linked to it got me thinking and it turns out that this bug can be fixed by going into Configuration -> Taxes -> Edit States/Provinces and manually adding countries and their states. Since we're wholesale I hadn't tooled around with the tax configuration, as we never use it. The only downside is having to go in and manually add all of those countries and states, which isn't difficult, just time consuming.
Running: AspDotNetStorefront ML 8.0.1.2/8.0.1.2