was there a such thing as a voice controller for the 2600 that was a headset with a boom microphone?
That's not an "Atari lipstick" and it's not 2600 specific. It was a product from the late 80s put out for multiple computer systems and consoles, and it's not really "voice control" setup. Already discussed in this thread here:
http://atariage.com/forums/topic/226000-my-video-about-the-mbx-system-milton-bradley-1983/
Here's the original ad:
As for the original question, yes Atari was working with Milton Bradley on a voice control and synthesis module for the 2600 called the 2