Storybird is a fabulous idea. Using art contributed by some of the world's best illustrators, students can quickly choose pictures and write a story.
It is so easy! On one simple interface, students drag over the picture and then type in the box. No saving, that's automatic. Just click the + sign to add the next page. Keep it private or share it with the whole world. See this discussion on EFL Classroom 2.0 about Storybird. You and your students will love it!
Here's a wonderful example made by an ELT teacher