I am a United States based developer and so far have been limiting my apps distribution in the app stores due to not being able to find much info on the various rules for import/export/taxes, etc... for selling apps to other countries.
From what I have read it looks like Amazon, Google, etc... all convert it to US currency at the time of purchase so that it basically for me would count as a purchase from a US company. So now if that is correct, it should be fine for me to widen my distro to other markets and basically just select them all (other than the ones that require free apps or special certifications).
Do any other developers (US based would be good to hear from as well) have any experience with any tax or import/export rules due to allowing google/apple/MS to offer your apps to other countries via the online marketplace? I just don't want to make a mis-step here.