Here in Brazil the topic Open Source is very popular. Everybody talk about Open Source at class, at work, with friends and so on... Including Brazil is one of reference in Open Source around the world. We have the fisl
in Porto Alegre, that is one of major Open Source's event.
Ok this is an premise and nobody has doubts (I guess).
Some days a go I saw an article on the web very very similiar that an article writed by me. This is not the first time that I saw some copies of text, article and include sites! Well... I don't know, but my idea about open source is if I read something and extend the idea or show another side or put my opinion AND show the credits. Well it's ok. But... if I just used the idea and not show the author, well in my opinion this kind of work has another name...
If you has an idea to extend something or put another point. It's ok, share your point. But why don't reveal the credits???
I know there are a lot of open source licences, the most populars are GPL
that is used for linux, CDDL
used for OpenSolaris
and the BSD
that's used for FreeBSD.
An great iniciative is the creative commons
iniciative that available flexibel license. You can read more here