This question already has an answer here:
In this thread it was stated that after "RingCT ready to be released, the work on integrating RingCT with multisig can begin". Ring CT is now implemented in the testnet, so I am wondering if there is anyone already working on coding it. If so, I would be interested in learning more about it.
Also, mrl-008 didn't seem like a very polished paper, so I got the impression that there was a more detailed version of it somewhere or in the works. Are there any follow up publications to that?