If you are in contact with him, just tell him NXT community definitely wants zerocoin/zerocash implemented on top of NXT.
So, do you know any links to the new paper or is this video the only thing that's currently available?
Searching, but can't find anything. From the talk it is clear they have figured out how to implement the zeroknowledge proofs using SHA256 and merkle trees, so they are leveraging existing crypto code in a new way.
I would imagine that they are working on a new paper to publish maybe to come out close to the same time as zerocash (May 2014)
Worst case, we do it without help based on May paper and code, but my guess is that the way they connect to blockchain will be very similar so any work we do to integrate libzerocoin should mostly apply. The two new commands to merge and split are so they can have their own blockchain. We just need the 288 byte zeroknowledge proof mechanism
James