Publishers ignoring your emails? Ambush them at a convention. @hakubak, who’s done it, has a checklist at @HyperboleGames:
http://hyperbolegames.com/2012/03/19/pitch-like-a-pro/
UPDATE:
@hakubak: @CardboardEdison @hyperbolegames 1) Thanks for the RT 2) "Ambush"?!? I mean I was just… Okay, yeah, kinda. But Rule 7 is in there. (“Respect the publisher’s time”)