IBM is buying Unica Corporation for ~$480 million for its advertising and marketing software. It's paying better than double what the stock was selling for. The deal should close before the end of the year. Unica is supposed to automatically predict customer preferences around which ad campaigns are built and measured. Unica, which has maybe 1,500 customers, and its 500 people will become part of Blue's analytics unit. IBM means to use it especially in developing countries.