I know the hassle when sending created banner ads to the customer. I started sending by email, then created a simple page with FTP.
Now I've created a new platform for easily doing this, called Adpiler. It lets you create preview pages in a minute, show your Hype (and other) banner ads in a real website, and customers can easily annotate feedback on the ad.
Hopefully this can be helpful for you as well. If you have any suggestions or feedback, please let me know.