It took hard work to create this mod, and you’ll hopefully be seeing it soon in Cydia. If you recognize the image of Steve’s silhouette, it’s probably because you’ve seen it other familiar places before.
A jailbreak developer who goes by the name of “iPhoneKillerStyle” has thought up a unique Siri mod that replaces the mic icon with Steve Jobs’ silhouette. As you can tell, the mod is pretty detailed. It even allows for multiple Siri mic colors.