Qwiki is a site that I've covered before in the past but was just reminded about when receiving a press email from them. Qwiki Creator is now open to the public and a fantastic site for creating interactive stories.
From their press email... "Using our new product, right through your browser, you can combine text,
photos, videos, maps, tweets, animated articles and more into a
beautiful interactive experience - embeddable and shareable anywhere -
narrated by you (or via text to speech if you like)!"
I highly recommend checking out Qwiki by clicking here!!