Tarnicus: This leads me to believe that:
a/ Not all versions of Borderlands contained it or
b/ SecuRom was not needed to load Borderlands through Steam
I searched my system thoroughly and SecuROM is installed, so it was most probably installed with Borderlands because I don't remember installing any other game with SecuROM DRM and I also have the Game of the Year edition.
Also for the folks saying the game is now still going to use Steamworks DRM, when I was referring to the game possibly showing up on GOG I meant after the launch of GOG Galaxy which would then support multiplayer as well since Borderlands is primarily a multiplayer game so there is no point in bringing it DRM Free with just offline single player.