Participant Countries

http://www.labiennale.org/en/art/exhibition/national-participations/

Participant Artists

http://www.labiennale.org/en/art/exhibition/artists/

Who will participate in Venice Biennale?

The participating artists will be announced in the official site.
As of January 10, 2011, the site is not updated yet though.
http://www.labiennale.org/en/art/archive/exhibition/artists/
For example, artists below will join;
Tabaimo(Japan)
Mike Nelson (UK)
Hany Armanious (Australia)
Christian Boltanski (France)