Mac: You know what’s boring? The little “Verizon” or “AT&T” logo in the left-hand corner of your iPhone. You know what would be way more awesome? The Batman logo, or an image of Pac-Man chomping down on pellets. CarrierEditor lets you change your carrier logo to whatever you want, with no jailbreaking required. More »

See more here:
CarrierEditor Customizes Your iPhone’s Carrier Logo, No Jailbreak Required