I just got hold of official Diablo III installer downloader (EU client)
Friend sent me a link which he used to download the downloader and it works for me also. I have used the link -> downlaoded the downlaoder -> now I'm downloading the client.
I have seen no EULA, agreed to nothing. So as far as law in my counry goes - I'm 100% legal.
BTW the dowloader is disguised torrent client
Thanks to bummzack here is link to all clients http://www.reddit.com/r/Diablo/comments/qxyxm/diablo_3_windows_and_mac_download_links_all/