Significant management changes have been made in the executive ranks and board of directors of Microcell Telecommunications Inc. since being acquired by Rogers Wireless Inc. this month. André Tremblay, president and CEO, and Jacques Leduc, CFO and treasurer, have left the front offices of Microcell. They have been replaced by Rogers Wireless president and CEO Nadir Mohamed and John Gossling senior VP and CFO. As well Alain Rhéaume, formerly president and COO of Microcell Solutions Inc., has been appointed executive VP and president of Fido. Microcell’s entire board of directors has resigned and is being replaced by Garfield Emerson, George Fierheller, Ann Graham, James Grant, Thomas Ian Hull, Nadir Mohamed, Pierre Morrissette, David Peterson, Ted Rogers, Martha Rogers and Christopher Wansbrough.  David Colville, commissioner and vice-chair of telecommunications at the CRTC, has announced that he will retire at the end of this year. He has been a commissioner with the telco and broadcast regulator since 1990 and vice-chair of telecom since 1995.  Ignition Point Technologies Corp. has announced that Greg Celmainis has joined the company’s board of directors. He started his career at Newbridge Networks Corp. in Ottawa, later founding Castleton Network Systems that was subsequently sold to Newbridge.  Amtelecom Income Fund, owner of Amtelecom Communications, has announced that Renato Discenza has resigned as a director with the independent telecommunications services company following his appointment as senior VP carrier services at Bell Canada.  Mobile games distributor Telcogames has appointed Kim Shon as managing director of the company’s recently created German subsidiary. He joined Telcogames from Mobile Scope AG, where he worked a key account manager.  Richard Siber has been appointed to the board of directors of Digit Wireless. Following his recent retirement from Accenture as partner, he has focused on assisting both early stage and mature companies develop strategies to advance the adoption of mobile wireless technologies across a wide range of industry sectors.