Facebook is expected to bring in the most U.S. online display revenue for the second year in a row, according to new estimates from research firm eMarketer. EMarketer estimates that Facebook will sell $2.58 billion in online display in the U.S. this year, good for 16.8% market share, while Google will finish the year with $2.54 billion, or 16.5% market share.

via adage.com