Plogue has announced the third member in their 'chip' series, Plogue chipspeech - a faithful emulation of all major classic speech synthesis chips of the early 1980s, and a few surprises. It's a synthesizer, not a Vocoder.
Plogue chipspeech is "coming soon".
Here's a teaser video: www.youtube.com/watch?v=P9AaOkU1WZs