PixnTell
"an iPad app for quickly creating simple narrated photostories. To create a story using Pixntell you start a new project, select some images, place them in order, and then start talking about each of your pictures. You control the timing for each image. If you want to talk about your first picture for twenty seconds, your second picture for just three seconds, and your third picture for fifteen seconds, you can do that. When your project is complete you can upload it directly to YouTube, share it on Facebook, or send to friends via email."--Richard Byrne from http://www.freetech4teachers.com/
The free version of Pixntell limits you to five pictures per project; for more images you need to buy the premium app for $0.99.