Link dump pure and simple

And now some harder-to-classify stuff:

• Metamarkets: why generic machine learning fails.
• MRPostfixBounce: an approach to email bounce handling. Should implement this for Despammed. Should do a lot of things for Despammed... Sigh.
• Some lectures on organizing systems. My sleep dep level is high enough I can't process them right now.
• pycparser: Yeah, a full C parser in pure Python. Neat!