The first tool I used was Animoto. It was a good one to get my feet wet and was perfect for creating a little video of our class's trip to Galveston to build sandcastles. It was very simple and provided enough options to design to be appropriate to the subject.
Bookr is another tool that will be helpful for my students. It would be an excellent way for my students to create an online portfolio of their work by creating a book using their own artwork. I will be working on my own Bookr "book" as soon as I can resolve my understanding of Flickr.