The Vancouver 2010 identity, with primary credit to design director Leo Obstbaum. Leo tragically and unexpected passed away August 21, 2009. From wikipedia:

Leo…was an Argentine-born Spanish design director for the 2010 Winter Olympics in Vancouver, Canada, as part of the Vancouver Organizing Committee (VANOC). Obstbaum was responsible for designing many of the main symbols of the Vancouver Olympic Games including the Olympic and Paralympic medals, the design of the 2010 Olympic torch, and the 2010 Winter Olympic and Paralympic Games mascots.

Diego Guevara posted an eloquent tribute to Leo on his blog, where he writes:

For athletes, spectators, and Games enthusiasts around the world, the graphic identity communicates the spirit of the 2010 Winter Games, telling its story in the universal language of design. The Vancouver 2010 graphic identity features many illustrated textures drawn from Canada’s natural and urban environments as well as its rich cultural diversity. All creative elements of the graphic identity were developed by VANOC’s in-house design team, with one key texture created by local aboriginal artist Xwa lack tun.

Diego also linked to a YouTube video which describes the teamwork that went into creating the identity, and defines the word “transmoflection”.

The Canadian Design Resource also has a tribute to Leo here.