Here is how to make it sound better:
Install Audacity and the LAME plugin for MP3s
Import the audio file in question
File > Apply Chain > CleanSpeech > Apply to Current Project
This will do a bunch of things. It will remove long pauses, clean up the range for human speech. It doesn't seem to remove echoing, but it is much better to listen to after running this quick plugin.
I had a hard time finding this, so I figure giving something back to the Google cause would be nice.
The original posting can be found HERE. The author goes into a little more detail on what it actually does.