Kant's texts online
General articles on Kant
Commentaries
N. Warburton - 13 minute podcast on Kant's Critique of Pure Reason
Susan Stuart's podcasts of her lectures on Kant's epistemology (available free from iTunes)
You might also check out a short piece I wrote on "The continuing relevance of Immanuel Kant."
"Human reason has this peculiar fate that in one species of its knowledge it is burdened by questions which, as prescribed by the very nature of reason itself, it is not able to ignore, but which, as transcending all its powers, it is also not able to answer."