This is the 100th episode of Lost.
At 8:00 minutes in Charles Widmore moves a "Wired" magazine from Daniel's couch. It has a bold title on the cover, "The Impossible Gets Real", a reference to the events unfolding in time and on the island.
The piano piece Daniel plays is from Chopin's Fantasie-Impromptu in C-sharp minor; this tune was then used in and became famous as the 1917 popular American song "I'm Always Chasing Rainbows."