I'm not aware of any follow up, but I agree it's an excellent lecture. Chomsky touches on a lot of interesting stuff, like the deskilling of workers, companies building up useless capacity to make sure strikes will have no chance, etc.
Chomsky, "Class War"
For the record the audio is on youtube:



"Class War", was the title of a really wicked lecture that he gave in the mid 90's on Capitalists' war on the American working class since the Wagner act to make the "pampered western workers" give up their "luxurious lifestyles". Did he ever make a follow up lecture to this???