I mentioned it.  It isn't any sort of priority item to me, personally.  However, at work, I have to pay passing attention to Windows and have hopes to get time zone information from data produced by zic into a product, but as long as zic works on Unix and the files can be transported to Windows, that's (probably) fine — though having zic compile on Windows would simplify customer-upgrades using the latest version of the TZ data.  All very much in the future.  (And yes, I'm sure there are APIs on Windows for the job; they're different from the Unix ones and that presents a problem.  And the uniform data source will be important, so people who use our product on Windows and Unix will be able to get the same time-zone results on both platforms, independently of whether the o/s is upgraded.  I believe it would allow them more timely access to the changes that occur.)