Jerry Yang, Yahoo Inc.’s (YHOO) co-founder and chief executive officer, today (Tuesday) stepped down from his post under heavy shareholder pressure. Yang will return to his former role as board member and “Chief Yahoo!” – a non-so-flattering, if not ironic, title considering the heavy criticism he took in the past year – upon the appointment of his replacement.

Jerry Yang, Yahoo Inc.’s (YHOO) chief executive officer, finally got his wish last Thursday when his company partnered with rival Google Inc. (GOOG) to enhance its online advertisement business.

Carl Icahn is adding to his reputation as a boardroom bully. In a letter to Yahoo Inc. (YHOO) Chairman Roy Bostock, the billionaire investor threatened to seek control of the board and resuscitate takeover talks with Microsoft Corp. (MSFT).