• The metaphors from George Lakoff’s Metaphors we live by are collected on the U Berkeley Conceptual Metaphor Home Page
• Mark Turner's home page – links to publications and an introduction to “blending”
• Huge but not up-to-date link collection at the Center for the Cognitive Science of Metaphor (UC San Diego)
• Chris at Mixing Memory has a four part series on Metaphors with many links and references (2004/10-11): part1 – part2 – part3 – part4

Stuff on George Lakoff’s application of material from linguistics and cognitive science in political discourse is on the frames page.