Great idea, Clark--and very desired. It is one of the most talked about and most attempted needs in the past couple years. Moodlespeex is the simplest but I wasn't happy with the audio quality. Gong required a heavy Java server and engineer ability to get it set up. Then there is DimDim and others that some have added on. You might even take a look at Paul Daniel's voice blog (among his many projects) for Moodle. I still have my students use Audacity and attach the file to the forum post--the only way I know that uses free software with good quality.
If you make one really simple, we would hail you as hero!
Forum
Forum with built-in audio recorder?
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