Here the rosters for the Canadian teams, as far as they have been announced:
Team Pacific
Goaltenders
Scott Orth (Cranbrook) Kimberley Dynamiters - KIJHL
Tyson Sexsmith (Priddis) Vancouver Giants - WHL
Defencemen
Eric Doyle (Calgary) Everett Silvertips - WHL
Travis Ehrhardt (Calgary) Moose Jaw Warriors - WHL
Thomas Hickey (Calgary) Seattle Thunderbirds - WHL
Ryan Kerr (Lions Bay) Prince George Cougars - WHL
John Negrin (West Vancouver) Kootenay Ice - WHL
Justin Palazzo (Kamloops) Prince Albert Raiders - WHL
Nicholas Ross (Lethbridge) Regina Pats - WHL
Forwards
Lucas Bloodoff (Castlegar) Trail Smokeaters - BCHL
Zach Boychuk (Airdrie) Lethbridge Hurricanes - WHL
Tyler Ennis (Edmonton) Medicine Hat Tigers - WHL
Colton Gillies (Surrey) Saskatoon Blades - WHL
Colton Grant (Standard) Camrose Kodiaks - AJHL
Matthew Hallick (Medicine Hat) Brandon Wheat Kings - WHL
Riley Nash (Kamloops) Thompson Blazers - Midget AAA
Prab Rai (Surrey) Prince Albert Raiders - WHL
Colton Sceviour (Red Deer) Portland Winterhawks - WHL
Brett Sonne (Maple Ridge) Calgary Hitmen - WHL
Brandon Sutter (Red Deer) Red Deer Rebels - WHL
Dustin Sylvester (Kelowna) Kootenay Ice - WHL
Kyle Turris (New Westminster) Burnaby Express - BCHL
Team Western
Goaltenders
David Aime, Thrashers - Prov. Midget AAA
Ryan Holfeld, Tisdale Trojans - Prov. Midget AAA
Defencemen
Jeremy Schappert, Seattle Thunderbirds - WHL
Matt Delahey, Moose Jaw Warriors - Prov. Midget AAA
Alex Plante, Calgary Hitmen - WHL
Luke Schenn, Kelowna Rockets - WHL
Keith Aulie, Brandon Wheat Kings - WHL
Brett Plouffe, Winnipeg Wild - Prov. Midget AAA
Forwards
Mike Proudley, Neepawa Natives - MJHL
Joel Broda, Tri-City Americans - WHL
Derek Hulak, Sask. Contacts - Prov. Midget AAA
Bryce Lamb, Southwest Cougars - Midget AAA
Nathan Green, Winnipeg Wild - Prov. Midget AAA
Ryan Funk, Saskatoon Blades - WHL
Joshua Schappert, Seattle Thunderbirds - WHL
Jay Fehr, Hawks - Prov. Midget AAA
Jason Gregoire, South Winnipeg Blues - MJHL
David Richard, Seattle Thunderbirds - WHL
Dustin Cameron, Sask. Contacts - Prov. Midget AAA
Dwight King, Lethbridge Hurricanes - WHL
Brett Breitkreuz, Yorkton Harvest - Prov. Midget AAA
Brett Leffler, Regina Pats - WHL
Team Ontario
Goaltenders
Trevor Cann, Peterborough Petes - OHL
Daryl Borden, Kingston Frontenacs - OHL
Defencemen
Drew Doughty, Guelph Storm - OHL
Cody Goloubef, Milton Icehawks - OPJHL
Mark Katic, Sarnia Sting - OHL
Blake Parlett, Barrie Colts - OHL
Brendan Smith, St. Mike's Buzzers - OPJHL
PK Subban, Belleville Bulls - OHL
Corey Syvret, London Knights - OHL
Forwards
Joshua Bailey, Owen Sound Attack - OHL
Yves Bastien, Kitchener Rangers - OHL
Bryan Cameron, Belleville Bulls - OHL
Marcus Carroll, Owen Sound Attack - OHL
Logan Couture, Ottawa 67's - OHL
Sam Gagner, Sioux City - USHL
Daniel Lombardi, Sarnia Sting - OHL
Dale Mitchell, Oshawa Generals - OHL
Michael Pelech, Kitchener Rangers - OHL
John Tavares, Oshawa Generals - OHL
Chris Terry, Plymouth Whalers - OHL
Zach Torquato, Saginaw Spirit - OHL
Team Atlantic hasn't been announced and Team Quebec is holding its selection camp right now, I think. You can find a 32 players long preliminary roster
here.