And here i was betting that the blueprints to the secret binaries would be released the weekend before the September 2nd, 2007 ISO vote on OOXML! Looks like Microsoft saved the move for when they really had to use it; jus tweeks before the February ISO Ballot Resolution Meetings set to resolve the Sept 2nd issues.
The truth is that years of reverse engineering have depleted the value of keeping the binary blueprints secret. It's true that interoperability with MSOffice in the past was near entirely dependent on understanding the secret binaries. Today however, with the rapid emergence of the Exchange/SharePoint juggernaught, interop with MSOffice is no longer the core issue. Now we have to compete with E/S, and it is the E/S interfaces, protocols and document API's and dependencies tha tmust be reverse engineered.
The E/S juggernaught is now surging to 70% or more of the market. These near monopoly levels of market penetration is game changing. One must reverse engineer or license the .NET libraries to crack the interop problem. And this time it's not just MSOffice. Today one must crack into the MS Stack whose core is tha tof MSOffice <> E/S.
So why not release the secret binary blueprints? If that's the cost of getting the application, platform and vendor specific OOXML through ISO, then it's a small price to pay for your own international standard.