Perhaps Apple engineers wished they could vote for Lincoln this time around, If you own a jailbroken iPod touch and have bought the January Software Upgrade, navigate yourself over to /private/var/mobile/Applications. There, you'll find your nikita_receipt.plist. Open it in your favorite property list editor, copy the payload (from <data> to </data>) and use your favorite online base64 converter to decode.
A sample of the Easter Egg...
Fellow-Countrymen: At this second appearing to take the oath of the Presidential office there is less occasion for an extended address than there was at the first. Then a statement somewhat in detail of a course to be pursued seemed fitting and proper. Now, at the expiration of four years, during which public declarations have been constantly called forth on every point and phase of the great contest which still absorbs the attention and engrosses the energies of the nation, little that is new could be presented. The progress of our arms, upon which all else chiefly depends, is as well known to the public as to myself, and it is, I trust, reasonably satisfactory and encouraging to all. With high hope for the future, no prediction in regard to it is ventured...
iPod Touch, Easter Egg, Easter Eggs, Hidden, Message, Apple