Get a Voki now!
This is an incredibly cool tool for online. Voki.com allows you to create an avatar, record some audio, and then combine the two to create a talking character for your online course site. Use these characters as introductions to case studies to add interest and engagement. I'm trying to figure out if there are ways to capture the video of separate characters to build up a story line which goes back and forth between characters (as a normal video would). I'll post later if I come up with a simple solution.