The post by Cringely provides no references, which I find odd. I found a Bloomberg wire article [1] about the judgement, but nothing at all about the alleged subsequent retribution.
http://www.informationweek.com/ibm-responds-to-overtime-laws...
Workers' petition, with names and an occasional email:
http://www.petitiononline.com/petitions/ibm1701/signatures
Short legal recap:
http://www.lawyersandsettlements.com/features/overtime_calif...
I did an intern year with IBM UK in the late eighties and (with hindsight) it seemed to have very good employment practices. I wonder if IBM in the US was once like that, and if so when things changed.