There's a one 1.4K patch for policykit (now an external depency) support for system-monitor (~7K SLOC) to basically replace 3 lines of gksu. Oh yes i know "it's so much powerfull" (that you have to rewrite kill, renice, etc). I'd rather depend on the new Linux file capabilities...
Kov was already my hero because of the clean design of libgksu API...

He's now my superhero !