Only a minor grip: I've purchased Aveyond and the CD music information ("As an extra thank-you for purchasing Aveyond...") is shown three times in the email :-)
Otherwise, everything looks pretty polished. Congratulations!
By the way, it would be great to have an option in my order history to send again the order email, in case it never reaches its destination. Its activation information is important enough and can't be seen anywhere in the profile pages.
Three times? Hm. Have to look into that.
Actually, eventually there will be a "my codes" section in your profile where activation codes can be viewed. Not working yet, though.