DeGraeve.com: WittyProfiles.com Podcast

WittyProfiles.com Podcast

I've created a weekly podcast using quotes from WittyProfiles.com. I used text-to-speech software to create audio files of the quotes and then stitched the files together with Audacity. My goal is to automate the podcast creation process. Does anyone out there know of a free UNIX command line utility or web-based text-to-speech service to produce audio files?