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I'm not aware of similar lengthy threads, although someone a bit more involved on the Adwords/Adsense side might be able to point you somewhere useful.
I think that generally speaking Adsense and Adwords changes tend to have less of a pronounced impact on so many site owners, perhaps as a result of being less frequent, and also less severe in their effect. Whenever major changes happen they're widely discussed, but I believe they tend to be more one-off events than the ongoing algorithmic changes with Google serps.