voice synthesizers ?
 

does anyone know which company does the voices for corporate phone systems ? I need to get a few recordings done for voicemail and a couple of other options.

actually, if you know any voice synthesizers that outputs quality stuff, it would be great too.

I've been playing with http://www.research.att.com/projects/tts/demo.html but it's not nearly as perfect as I want it to be.

Thanks!