Check out this audiovisual tutorial on using podpress, a plugin that allows you to podcast from your wordpress blog. http://www.mightyseek.com/podpress/podpress-tutorial/
The tutorial uses Camtasia Studio to deliver a video tutorial with audio content. Unlike more elaborate tutorials using tools like Captivate, the Camtasia Studio allows you to put more focus on your voice. There's something that's really nice about hearing someone speak in a personal tone, who is not reading from a script. The combination of podcasting with technical instructions has amazing potential. I think I may try to create a tutorial like this for wordpress.
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I'm a technical writer based in the California San Francisco Bay area. Topics I write about on this blog include technical writing, authoring and publishing tools, API documentation, tech comm trends, visual communication, technical writing career advice, information architecture and findability, developer documentation, and more. If you're a professional or aspiring technical writer, be sure to subscribe to email updates using the form above. You can learn more about me here.