Here's a dose of good news for those companies who make money through online advertising. According to a report out today from the Interactive Advertising Bureau and PricewaterhouseCoopers, online advertising revenue jumped 7.5 percent during the first quarter to $5.9 billion. That's the highest first quarter tally on record, according to the report.

“The media industry —like the economy as a whole—saw tremendous challenges this past year, and uncertainty about the recovery remains," said David Silverman, a PwC Assurance partner. "However, entering 2010 with such strong Q1 revenues is a sign of the health and vitality of online media, and of marketers’ continuing investment in interactive as a cornerstone of their advertising campaigns.”

The IAB report comes at the same time as comScore reports that online display advertising reached $2.7 billion during the first quarter. It found that the average CPM during the quarter was $2.48.

Here's a look at comScore's numbers on the top publishers of display ads:

And here's a look at the biggest display advertisers: