Google Inc, (GOOG) is down fractionally on a report that it has held low level talks with Twitter to sound out the social networking site about being acquired for as much as $10 billion. Privately held Facebook, Inc. has also reportedly held similar talks, according to a report in The Wall Street Journal. Twitter was valued at $3.7 billion in December after it raised $200 million in another round of financing. It currently has in excess of 175 million users. Google opened down 75 cents at $615.75 and fell to a low of $612.18 before paring losses to trade at $612.80, down $3.70, or 0.60%
