According to wikipedia's article on Shinjuku station, including an underground arcade, there are well over 200 exits.
http://www.jreast.co.jp/e/stations/img/map_e/e866.pdf mentions a few exits but the fact that the "East Exit" exits into the Metro Promenade, which in turn, takes you to an underground shopping mall, with its own exits, as well (http://www.subnade.co.jp/english/e-floormap.pdf), is not accounted for. I'm sure there are other examples, as well, but I'm not aware of them.
In light of this it'd be useful to have a fully comprehensive map of the Shinjuku station and associated facilities and all the exists there-in. I don't suppose such a map exists?
It'd also be cool if such a map could show you where each of these exists exited, at street level, on Google Maps, but that might be too much to hope for lol.