* Berkshire Hathaway Inc. (NYSE:BRK.A) (NYSE:BRK.B)-owned MidAmerican Wind agreed to acquire two California wind projects from a unit of Terra-Gen Power. * Internet recruiting service Monster Worldwide, Inc. (NYSE:MWW) advanced 2 percent after DealReporter said the company may receive a takeover bid from private-equity firm Symphony Technology Group LLC and a partner. * 3M Co (NYSE:MMM) agreed to buy ceramic armor maker Ceradyne, Inc. (NASDAQ:CRDN) for $35 a share, a 43 percent premium to its closing price of $24.43 a share on Friday. * The U.S. Defense Department has awarded a 50-50 joint venture of Lockheed Martin Corporation (NYSE:LMT) and The Boeing Company (NYSE:BA) a contract valued at $1.17 billion to provide satellite launches, according to a Reuters report.