Hi Sandro,

from my understanding of your needs, you do not need the core mdoule Blog to do this. You'd better use an RSS feed aggregator to gather all contents from your selected sources and display it on your wesite as a content directory. This is what the wonderful dotnetnukeblogs.com does: it checks the subscribers' blogs for new entries and displays them to the readers. The core module Blog is the right solution if you want to publish your own content, it has no built-in feature to aggregate external source data.

Lastly, I think that this doesn't violates any copyright as far as any content is directly linked to its source. Your content aggregator should work as a 'showcase', unless specifically permitted by the content editor.

Best regards,
Dario Rossa