WSO2 Mashup Server Screencast #1: Hello World
Jonathan has done an excellent introduction to the WSO2 Mashup Server. If you are a 'Level 0' Mashupper yearning to start writing your own Mashups, this screen cast is a must view.
BTW, you ain't seen nothing yet. I had a sneak-peak at some of his other screen casts and those were pretty awesome!!