According to the Interactive Advertising Bureau (IAB) and Pricewaterhouse Coopers, revenue from online advertising spiked to a new high in of $7.3 billion in the first quarter of 2011. Q1 numbers are up 23% over same period in 2010. However, this figure is a slight drop from the fourth quarter of 2011, which saw $7.45 billion in online ads, AdWeek has reported.