Funny that Vocoder Plug-ins are not more popular. There doesn't seem to b that many, and nothing new. Penatgon manages to have a form, I wonder why other softsynths manufactures haven't done the same. Hip-Hop and Rnb seem to be keen on the sound, disco, house and funk too. The auto-tune sound dubbed as 'the vocoder sound' which is clearly not, I would have thought would have made Vocoders more sort after. Maybe that sound is close enough, satisfies, or maybe many don't realise the potential of 'The Vocoder Sound'.
It's a shame Melodyne doesn't export Pitch data in midi translation, not only would it be great for making synths and samples have more movement, but combined with a great sounding vocoder, could add another dimension to the synth voice.