There is a spectacular view from Louis Shallal's window of Ottawa's Rideau Canal, the Chateau Laurier, Confederation Park and other sights that constantly turn up in the nation's postcards. And there is a certain irony too.The Executive Director of Information Technology for Ottawa-Carleton Region can also look out at more than a dozen '50s- and '60s-era government buildings, including the central post office, now sitting virtually half empty while he plots a revolution in public administration.