US Internet advertising revenues remain strong, topping $23 bln, according to Interactive Advertising Bureau (IAB) and PricewaterhouseCoopers LLP (PwC). Full-year 2008 revenues totaled a record $23.4 bln, exceeding 2007’s performance, itself the former record of $21.2 bln, by $2.2 bln or 10.6%. Q4 2008 revenues of $6.1 bln mark the first time the interactive advertising industry achieved, and surpassed, $6 bln in a single quarter. The figures represent a $154 mln or 2.6% increase from Q4 2007, which had revenues of $5.9 bln. This is the fifth consecutive year of record results.