I’m currently following around a hundred people, and I would guess that I would have to be on Twitter an hour a day cumulatively to truly keep track. I’m not willing to make that kind of time investment.

Search remains the big daddy. According to eMakreter it will account for 40% of the $25 billion that marketers will spend online this year. Right behind it at 21% (or $5.1 billion) is display advertising. However, according to a new study, a giant percent