Nice. Grabs the whole article text so you don't have to leave the RSS reader.
Works well for keeping up with HN too :)
Setting up a quick script to rip all the content from another site is trivial. There's also wget -m
Add /opt/local/bin to your PATH (bashrc or zshrc or whatever you use).
sudo port install libxml2 and sudo port install libxslt
Then sudo gem install nokogiri --no-rdoc --no-ri should run with no issues. That's all I had to do for the system ruby (1.8.7 on OSX 10.6) and 1.9.2 via rvm.