In reply to rms although I wouldn't ask anyone to flout copyright I agree that the stumbling block is the publisher rather than the author. Even if you can't find a copy online I've never been refused a copy when contacting the author directly.
If pg doesn't delete your comment, isn't he guilty of the same thing as The Pirate Bay are being charged with? (actually I guess he is protected in the US unless he gets a DMCA notice?)
Most scientists really don't care about the copyright on their journal papers being violated. They would prefer them to be read as widely as possible. It's only the journal publishers that try and protect the content. Sometimes you can find papers under journal firewalls on the authors' academic websites.
Sadly it isn't freely available.