Businessweek.com is reporting that the online video ad space will be worth 4.3 billion by 2011.

But a new report by eMarketer, released July 16, suggests Web surfers ain’t seen nothing yet. Video ad sales are expected to grow from an estimated $775 million this year to $3.1 billion in 2010 and then to $4.3 billion in 2011. That’s up from a November projection in which eMarketer estimated 2010’s video ad sales at less than $3 billion (see BusinessWeek.com, 11/7/06, “Up Next: Online Video Ad Boom?”).

Though the numbers sound large, the expected activity over the next four years suggests that advertisers will be merely experimenting with the medium. Even at $4.3 billion, spending on video ads would account for just $1 of every $10 of Internet advertising.

Still not sure about getting into video?