Today's New York Times article, "Google Said to Violate Copyright Laws," notes,
A Brussels court ruled Tuesday that Google had violated copyright laws by publishing links to articles from Belgian newspapers without permission. Legal experts said the case could have broad implications in Europe for the news indexes provided by search engines.
It goes on to say,
'It could set up a chain reaction, especially in European countries, where the authors’ rights are stronger,' said Pamela Samuelson, a law professor at the University of California, Berkeley, and the co-director of the Berkeley Center for Law and Policy. 'If a Belgian court causes Google to change its ways, by preventing links from happening or forcing it to pay, other countries and other newspapers and other entities that have put things on the Web could say "me too."'
Where to draw the line on copyright has been around for a long time. A decade ago, when I was product manager at a now-defunct content portal, Amulet, we worried about being sued for storing publicly accessible content on our servers. (We cached it locally for better performance.) There was even talk at the time that storing content on proxy servers was illegal, although that issue seems to have been forgotten over the years.