Yeah. I think the thing Harris should change his mind about is the simplicity of "well-being of conscious creatures is all that matters." We might care about other things, value extrapolation is needed and might surprise us, blah blah blah. I also don't like the way he frames the issue of defining morality; I'd prefer he talk more like this. But that's more of a semantic quibble.
Sam Harris is here offering a substantial amount of money to anyone who can show a flaw in the philosophy of 'The Moral Landscape' in 1000 word or less, or at least the best attempt.
http://www.samharris.org/blog/item/the-moral-landscape-challenge1
Up to $20,000 is on offer, although that's only if you change his mind. Whilst we know that this is very difficult, note how few people offer large sums of money for the privelage of being disproven.
In case anyone does win, I will remind you that this site is created and maintained by people who work at MIRI and CFAR, which rely on outside donations, and with whom I am not affiliated.
Note: Is this misplaced in Discussion? I imagine that it could be easily overlooked in an open thread by the sorts of people who would be able to use this information well?