Spiral Knights has 4 instances (to the extent of my knowledge): The main website, Steam, Aeria Games, and...KONGREGATE.
You see, I am a use of Kongregate, who must inconveniently make a Steam account for the sake of posting on the forums (which, to say the least, is moderately aggravating, considering how Steam accounts need to log in again every once in a while). Thus, my suggestion is to allow us Kongregate users to link our accounts to the main website or Steam.
Hm... I think it's Drupal you need to talk to? Either way, +1