I have always wanted to know more about duplicate content. If you like to read about it. You could check out The WWW Observer .
Tell me how do you deal with duplicate content ? I have been wanting to ask this as well. Since many blogger are having contest on their blog. Does it mean that blogger that participate in the contest are duplicating the content of the contest? I don't know that's why I am ask you about this.
I think blogging is a learning stage for everyone.