At the Email Design Conference Mark Robbins from Rebelmail wowed the audience on the magic of interactive email – carousels, shopping carts, interactive presentation slides – all inside an email.
For those of you who are interested in getting your feet wet with interactive email - here's an image carousel for email builder.
http://freshinbox.com/resources/tools/carousel/
You can create a thumbnail driven image carousel with your own images that work in iOS, Android, Yahoo! Mail and Gmail (webmail).
Love to hear feedback!