MTP exists on testnet though and the testnet was redeployed again due to improvements on with a reduction of proof size on MTP and also to resolve the implementation issue raised by by mbevand.
You can see it progressing here:
http://testnet.zcoin.io:3001/Because of these changes we will extend the bounty competitions.
We also have been given a draft copy of a research paper provided by @hidetoshi that touches on MTP that we have agreed to not release until they have finalized their research and we are assessing its impact. They're also waiting for MTP's authors to reply. Our dev team has been very busy in looking into this.
Ethereum mixer:https://github.com/zcoinofficial/ethereum-zmixerRiordant has pushed a functional outline of the Ethereum zmixer here.
There's a lot more code that he has done but he is not pushing it just yet until he gets clarification on how big integers will be handled in Metropolis:
https://github.com/ethereum/EIPs/blob/vbuterin-patch-2/EIPS/bigint_modexp.mdThe wallet works we have a private 0.8.7.9 version also in Slack if you guys want to try it out which I am using which seems to resolve some sync issues but our core upgrade is very close to finishing which greatly improves performance.