A dry press release from Google this morning announced the effective-immediately departure of Genentech chairman Arthur Levinson from Google's board of directors. Levinson remains on Apple's board of directors, from which Google CEO Eric Schmidt resigned in August.
Schmidt's resignation leaves only climate change activist Al Gore with overlapping roles between the two companies. Gore sits on Apple's board of directors and also serves as an advisor to Google. But Levinson's resignation hasn't stopped the Federal Trade Commission from its ongoing investigation into whether or not Google and Apple are too tightly entwined, and thus too powerful in the tech industry.