I have to apologize. In several threads about Buenos Aires and Argentina, lately one started by @tristanbaldwin , I spoke negatively about the Argentinean version of these forums.
I just checked them and they have been revamped. Of course it is too soon for a more knowledgeable opinion, but the first impression is good. There is, apparently, a new moderator and things seem to be well organized. Finding information about a candidate you would like to hire is quite easy.
So I withdraw my previous judgement because it was outdated. If you are able to read and write in Spanish, you should definitely check it when researching a hire.
Chau!