Goldman Sachs is acting like Goldman Sachs again. The Wall Street giant is coming off one of its best years on record, its share price is through the roof, and its executives are downright giddy over its swelling deal pipeline. Equity trading is booming, and dealmaking is thriving ahead of what could be one of the biggest years for IPOs of all time, big boons for Goldman's bottom line.If the bank had lost its luster, CEO David Solomon seems to have gotten it back. Goldman is once again Wall Street's top do ...