GDC 2010 brought a lot of new information to the surface for several games. Guild Wars 2 wasn't about to be left out of the loop. ArenaNet has released several new concept art video tours from GDC 2010 for Guild Wars 2 and you can see them all here.
ArenaNet Releases New Guild Wars 2 Videos from GDC 2010
Video by Stacy Jones on Mar 24, 2010