I'm willing to write a bot that transfers new releases from LibriVox (public domain spoken audio archive) to Commons automatically, if and only if I get two committed volunteers who add the relevant files to Wikisource editions, and build a nice Spoken Wikisource directory like the one on the German Wikisource. ( http://de.wikisource.org/wiki/Wikisource:Gesprochene_Wikisource )
Any takers, please reply offlist.