"Objective" good and bad require an answer to the question "good and bad for what?"-- OR -- "what is the objective of objective good and bad?"
My answer to that question is the same as Eli's -- goals or volition.
My argument is that since a) having goals and volition is good for survival; b) cooperating is good for goals and volition; and c) morality appears to be about promoting cooperation -- that human morality is evolving down the attractor that is "objective" good and bad for cooperation which is part of the attractor for what is good for goals and volition.
The EXplicit moral basis that I am PROCLAIMING (not slipping through the back door) is that cooperation is GOOD for goals and volition (i.e. the morality of an action is determined by it's effect upon cooperation).
PLEASE come back and comment on the blog. This comment is good enough that I will be copying it there as well (especially since my karma has been zeroed out here).
I'm not sure that I understand your comment. I can understand the individual paragraphs taken one by one, but I don't think I understand whatever its overall message is.
(On a side note, you needn't worry about your karma for the time being; it can't go any lower than 0, and you can still post comments with 0 karma.)
The title says it all.