As with every BlizzCon, BlizzCon 2011 will feature competitive tournaments with players from around the world. The tournament bracket for StarCraft II is up on the BlizzCon site. The competitors, two from each region, can be seen below.
North America
[Terran] Kyeonghyun "SeleCT" Ryoo
[Zerg] Shawn "Sheth" Simon
Latin America
[Terran] Juan "terran" Tena
[Zerg] Felipe "KiLLeR" Zúñiga
Europe
[Zerg] Jos "Ret" de Kroon
[Protoss] Johan "NaNiwa" Lucchesi
Russia
[Zerg] Dmytro "Dimaga" Filipchuk
[Terran] Pavel "Brat_OK" Kuznetcov
Korea
[Zerg] Jaeduk "NesTea" Lim
[Terran] Jonghyun "Mvp" Jung
Taiwan
[Zerg] Yang "Sen" Chia Cheng
[Protoss] Liu "Nifi" Yi-Ting
SEA/ANZ
[Zerg] Andrew "mOOnGLaDe" Pender
[Zerg] Thomas "JazBas" Cho
China
[Terran] Dai "Loner" Yi
[Zerg] Huang "ToodMing" Huiming
The bracket can be seen here.
Sources:
BlizzCon - Meet the Competitors
BlizzCon - 2011 Global Battle.net Invitational