linux voice synthesis - Nghost
the v5 release of cepstrals voices for voice synthesis are out.
These are pay to use voices, but of a much better quality then say flite, or festival voices.
this is not open source software, fyi. they charge $30 a voice, which I didn't have a problem paying, considering the quality. I already had an older version, so my upgrade was $10.
Nghost is working on integrating voice feedback, which will support cepstral, flite, and festival, or any command line based output.
I'll add a link to the audio once I find somewhere to host it.