The Conservatives swept (won all the polls in) a riding in
Quebec (Beauce)! That riding, like all currently Conservative-held ridings in Quebec except Roberval-Lac-Saint-Jean which they picked up more in a by-election in September 2007, wasn't even held by the Tories going into the 2006 election (and they might have swept it in that election as well, as their candidate got 67.02% that year but "only" 62.40% in 2008), although the BQ vote went down from 19.97% to 14.00% so they might have won a poll in the previous election.
Neither the NDP or the Liberals swept any ridings (although the506's Excel file on the number of polls carried by each party in each riding has or had the Liberals sweeping one riding in Quebec). The Bloc Québécois swept two ridings, Montcalm and Rivière-du-Nord. All other poll sweeps were Conservative sweeps, two in Ontario (where they also won all polls except one where they tied with the Liberals in one riding, Carleton-Mississippi Mills), two in British Columbia and eight in... take a wild guess.
[Edited to correct the misstatement that the Liberals had swept Saint-Léonard-Saint-Michel, QC.]