Dúvidas de informática (http://www.duvidasdeinformatica.com)
It's a free and portuguese colaborative platform of Questions & Answers related to the world of informatics.
Regularly it give prizes to the most-voted users.
From people that are giving the first steps to the ones with advanced knowledge.
- To have 954 pixels width ( about the height be creative :) ) and easily explain the concept:
I >> Ask or Answer >> win prizes
- Is going to be placed in the home page of http://www.duvidasdeinformatica.com/ between the "google search" box and the tabs "Recentes, Populares, etc."
Any doubts or questions tell me please.