It turns out Jay-Z did get to perform on Inauguration Day, just not at the big show. He dropped by the Neighborhood Ball to perform "History" (his post-election celebration track) in some new glasses. The fact that Jay performed the song on the night Obama was sworn in as president certainly makes the song more meaningful, and Jay really took the opportunity to work the crowd and celebrate.
"History" is still rumored to be appearing on The Blueprint 3, which is still in production. [NahRight]