Companies continue to shift their advertising dollars to the Internet, as online ad spending grew nearly 28 percent to $7.3 billion in the fourth quarter of 2007, according to research firm International Data Corp. This caps off a year of ramped up spending for companies, with spending in 2007 up 27 percent to $25.5 billion.

This is shocking because Q3 2007 was the first quarter ever where online ad spend in the US surpassed $5B. So for it to grow to $7.3B in Q4 is very bullish.