EXHIBIT 4.29 CLASS A PREFERRED STOCK EXCHANGE AGREEMENT Class A Preferred Stock Exchange Agreement, dated as of March 4, 1999, by and between MCI WORLDCOM, Inc., a Georgia corporation ("MCI WCOM") and WAM!NET INC., a Minnesota corporation (the...Class a Preferred Stock Exchange Agreement • April 1st, 1999 • Wam Net Inc • Services-computer processing & data preparation • Minnesota
