Evilbible.com says here that the omniscient Christian God has emotions such as anger and frustration that we only feel when there is something we cannot change. He also is suprised by new information, and there should be none if God is truly omniscient.
www.christianteenforums.com/God-emotionst62950.html has a small article about this. God had emotions and we experience them because we are made in His image. God's emotions, however; are different from ours in the sense that they are perfect, and do not need the same stimuli we do to provoke them. "For my thoughts are not your thoughts, neither are my ways are not your ways, says the Lord" Isaiah 55:8. Even when anger is mentioned, it is always right behind the word righteous when referring to God.