After the highlighting of open source software at Siggraph,Â a conference is already scheduled in Argentina to focus on 3D animation with open source tools.
From the Plumiferos site:
Manos Digitales Animation Studio, FundaciÃ³n VÃa Libre, and Blender Foundation will realize a conference about 3D animation with open source tools, where they will show material from PlumÃferos and the short film Elefants Dream, completely developed with open source software. Elephants Dream director, Bassam Kurdali, and Andy Goralczyk will be present. The conference will take place on August, 29th, at 7 pm, on Centro Cultural CooperaciÃ³n (1543, Corrientes Av, Buenos Aires City, Argentina).
More information can be found hereÂ (Spanish).
If you're near Buenos Aires, you should definitely have a look!