As the Yahoo! shareholders meeting on August 1st rapidly approaches, Yahoo! is preparing. They sent a letter to their shareholders on Thursday, urging them to vote against a proposal by Carl Icahn which could result in the unseating of some of all of the Board of Directors. The letter, from CEO Jerry Yang and Chairman Roy Bostock was also filed with the SEC Thursday afternoon. The letter is pretty long, but pretty contentious as well. There’s no doubt that the battle has just begun. Some high (or low) lights: