Odeo is a podcast service that lets users search, find, and subscribe to podcasts, as well as a tool to create your own podcasts with minimal hardware. I am not much of a podcaster or a podreceiver. One feature that I liked in Odeo was the ablility to send voice messages. You can embed the HTML code in your blog/website, like the one below.
Visitors can use this to leave a voice comment rather than a textual comment. You can record the voice, preview it and then send the same with some optional text. One important feature missing is the ability to edit the voice message.
Also it would have been nice, if there was some way of integrating the voice comment along with the textual coments for the post.