It's excellent news that Kraken have provided an independently verifiable declaration of liabilities, using the Merkle technique, and provided open source tools to do it.  Let's hope they also progress to independently verifiable proof of assets and adapt their tool to emerging standards, because then they can just automate the whole process and prove reserves daily, and customers can choose any interoperable verifier.

Also to consider: does this qualify for comboy's offer of free promotion at bitcoinity?  Technically I think CryptX.io and peat.io had implementations first, but AFAIK both were pre-launch at the time.