Odeo
Odeo (http://www.odeo.com/) is a service for managing audio. You can record audio directly through the website if you have a microphone, record a segment over the phone (note: I haven’t gotten this to work yet), or link to an existing MP3 file on the web. You can then organize, annotate, add a picture, and share the files. either by RSS or via a Flash based player that can be embedded in a website.
I used Odeo to create and embed the audio segments for a presentation on Web 2.0 tools and this blog at HigherEdBlogCon. (The video on the first “slide” is hosted by a similar service for video called YouTube.) You will need a Flash plug in for your browser in order to hear the clips.