I think BlockchainID is a step in the right direction but is it even alive still? The only specification I know of is a draft that's now 9 months old and leaves the question of security up to users having a strong password. Beyond that I thought it was just proof of concepts.
As someone building an identity system on Ethereum, I'd like to remain interoperable, but I don't know where I would find info unless I dig through blog posts.