If you've been dying to start poking around the Android Wear source code, now is the time! Google just posted 4.4W to AOSP. The active development branches are distributed throughout each project repository as kitkat-wear. This is the location where further patches and minor updates will appear. There is are also tags for android-4.4w_r1 (build KTU84Q), which represent the first official release of the platform.
There aren't any repositories for either Dory (LG G Watch) or Sprat (Samsung Gear Live), but we can't be certain if they will appear in AOSP or if the distribution of device specific source code will be left up to the manufacturers.