When I visited Rio this February, I managed to run two .NET Gadgeteer workshops.
The first one was at the Superior School of Design @ Rio de Janeiro State University, and counted with almost 30 participants.
The second workshop was aimed at first year Computer Science and Engineering students and took place at the Informatics Department @ Pontifical Catholic University of Rio de Janeiro.
The experience of running these workshops was great and I hope to be able to do it again in the future. I would like to thank all participants, everyone that helped me organize the sessions (special thanks to Dr. Denise Filippo, Dr. Hugo Fuks, Wallace Ugulino and Gabriel Barros), ESDI-UERJ, DI-PUC-Rio, and the guys at Microsoft Research Cambridge that kindly lent the necessary equipment.