Yeah, I just read my post and realised how crazy it looks...

Type in C h u c k N o r r i s, only without the spaces (except between and k and N). Chuck Norris (roundhouse kicking guy) comes out as Raoul Duke.

More information can be found on Raoul Duke here.

EDIT: I just discovered ChuckNorris is not affected by the Duke virus. So I guess it's not an issue.