The battle for Yahoo takes a new twist. A source tells Reuters the US Justice Department is looking into possible anti-trust implications surrounding Yahoos two-week search test with Google. Yahoo has confirmed it is in contact with the Justice Department and provided information on the nature of the test. Scott Kessler, equity analyst at Standard & Poors: SOUNDBITE: Scott Kessler, Equity Analyst, Standard & Poors saying, (English): "Those two companies together depending on how you look at it could easily exceed 75% of the internet search advertising markets and we frankly dont think that regulators would look upon that type of relationship especially favorably. " Microsoft has set a Saturday deadline for Yahoo to make a friendly deal and accept its $44 billion offer. If the two companies cannot come to terms by then, Microsoft has threatened a hostile takeover. Sources familiar with the matter have told Reuters Yahoo was in talks with News Corp and Time...