[janeglendale]

Definitely check out http://voicebunny.com -- it's amazing how much higher quality anything sounds with a professional voiceover. If you don't care about the specific voice (and just that it's professional-sounding), it's not too expensive and the turnaround is quick. They also have something called bunnycast.com, that turns your blog posts into audio for $19/each.

That being said, it's not exactly cost efficient for long how-to videos.

[dholowiski]

As you said - not really cost effective. But I had an audiobook recorded by someone I found on a similar service for a lot more than $19 and it was worth every penny. If I was a startup producing howto or advertising videos I would absolutely do this.