Can't remember where, but a mixture of Sam's blog and Twitter made it pretty much definite. I'm very interested to see how it pans out because Eliezer is probably one of the most intelligent people on the planet imho.
Excellent podcast from last year between Dan Carlin from "Hardcore History" and Harris. It's nice to listen to a podcast where the guest actually understands what Harris is actually saying without going on an emotional SJW tirade, about something that isn't even what Sam actually said.
At times it seems like Dan is needlessly arguing with Sam, but it's really just him doing his "other side of the story" thing he does in his podcasts. Plus it is nice to see Sam have a challenge to his mind, Dan Carlin is on point with his conversatorial skills.