NEW YORK (Reuters) - Air America Radio, the upstart liberal talk show network that has been plagued by management troubles, is seeking to raise new money in efforts to pay off debts and steer the business back toward profitability. A group of early investors that include Florida plaintiffs lawyer Mike Papantonio, Chicago entrepreneur Sheldon Drobny, and Rob Glaser, chairman of RealNetworks Inc., have committed to invest new capital, people familiar with the company said. Air America has also moved to fill a void in its executive ranks. Doug Kreeger, also an investor, assumed the role of chief executive last week....