Email the link and /or embed your audio message in a blog or website. Reccomended by Larry Ferlazzo
Edublogs has it's own "youtube" geared for education. You can import youtube videos directly. Good video source for those districts where Youtube is blocked.
Great list of education-based social networks. Some are Ning based, all are categorized.
Great video on how Education is ranked at the bottom of all industries regarding the use of technology. Found this video via Kevin Jarrett's blog\nhttp://www.ncs-tech.org/?p=1414