That was during the height of the controversy. Once the heat died down, and people stopped caring - which didn't take very long at all - almost all of those advertisers have now crawled back to the show.
http://www.washingtonpost.com/lifest...KhS_story.html
That articles from the end of March - not even a month after the story broke. The public has the attention span of a gnat. We get real riled up over something, threaten boycotts, get some advertisers to listen....but then we go running after the next source of outrage, and once the coast is clear, those companies come back, and pick up right where they left off.