I installed the Windows git-annex, and had to run the following command from Git Bash (in Admin mode) in order to get git to see git-annex:
$ ln -s /C/Program\ Files\ (x86)/Git/usr/bin/git-annex.exe git-annex.exe
Was this 1) a known install issue that I missed somewhere? 2) a failure in my particular installation? 3) or was I supposed to put C:\Program Files (x86)\Git\usr\bin in my Windows path?
Wasn't sure if we needed a docs update...
Git for Windows has an option at install time to add it to the path. What you pick there should control whether git-annex is in the path or not, outside of Git Bash.
In Git Bash, /usr/bin/ is in PATH, so the git-annex.exe in there should be seen by git.