Grass-Roots Activist: Yahoo! Just the Start

Look out, high-tech fat cats. Eric Jackson, the private investor and blogger who helped bring down Yahoo!'s(YHOO Quote) Terry Semel, is turning his sights on other underperforming CEOs.

"I have a list, and I'll be taking action," he tells me. "There are a number of other companies that are ripe for the same kind of approach. This won't end with Yahoo!"

He's naming no names, though he says several of his possible targets are "mid-cap tech companies."

After taking on the board at Yahoo!, which has a market cap of $37 billion, that should be a breeze. ...