Ability to toggle on/off the auto email confirmation to clients at checkout.
This is particularly important for me as a non US user in a non english speaking country. I appreciate that localisation of the software is no doubt a way off. I can workaround the language in the UI, and hope to shield the user from all the English as best I can by adding my product names and descriptions in Japanese (not tested this yet), but the auto email to the client throws a spanner in my attempts to shield them from all the confusing english.