This site had online talking story books that could be used on an interactive whiteboard. This could be done as a whole class or used in small groups of students.
Blog of Coordinator of the American Language Program at Ohio State University (one of the country's leading universities for Linguistics). Purpose of the blog is to "compile interesting technologies that are ... related to teaching ESL." Still not much there, but worth watching.
Skribl is another online sharable whiteboard. I'm happy- because they recently added an embed widget for sharing and collaborating. The user interface is kind of home-grown, but it's functional. With a login, you can save your boards for later use. It's not the prettiest UI, but saving is key.