Earlier this year, the Reddit thread "Hey Reddit, how do you think the human race will come to an end?" received a fairly elaborate Singularitarian reply. Although it might be unfair to generalize given the context, he seems to be taking a basically fatalist stance, taking it as given that whoever creates AIs will program them to share our values.

The post currently has about 1165 karma (not necessarily representing votes of agreement), plus at least a few hundred replies taking probably every major position on the subject. This reply links to Robin Hanson's article If Uploads Come First.

I was disappointed that this subthread ended with the rhetorical question "What current AI projects aren't working with brains?" unanswered.

(Edit 11/25: corrected the assumption that the number of upvotes displayed by the script I had installed was accurate.)