This is a “limited” introduction – that is the file will initially be available only on Google Docs. This is done ONLY to verify that the file works (i.e. there are no catastrophic issues) before releasing to repositories like Avsim or Flightsim. The file is 128Mb so, Google Docs is likely to have bandwith issues. Rest assued that the file will be released to the usual servers asap.
Learn more on Dino Cattaneo’s blog