Developer preview version of Mac OS X 10.7 Lion has already been released by Apple. As soon as Apple seeded an early version of Mac OS X 10.7 Lion to the developers, it was only a matter of time, and now the disk image is being shared by a good few thousand of users on various torrent sites. Now you can download Mac OS X 10.7 Lion from various Torrent sites but it is not safe to download it from the torrent sites.
According to 9to5Mac, an installed version of Lion will “phone home” to Apple with no telling whether the Cupertino outfit will seek to block users not already registered as a developer. Also, it really makes a little sense to download it from a shady site however when Apple offers a Mac Dev account for just $99. So it is wise to register in Mac developer account.