Professor Dworkin, who was on the faculty at NYU Law School and Emeritus at both Oxford and University College London, was a prolific contributor to political and legal philosophy. I will post links to memorial notices as they appear.
UPDATE: There's a short AP obituary here, which is actually pretty good on the substance of his views. (Thanks to Les Green for the pointer.)
ANOTHER: The Guardian obituary is a bit hyperbolic, and contains some factual errors (e.g., Dworkin's daughter was a PhD candidate in philosophy at Cornell, not a philosophy professor there). But it also gives a fuller portrait than the short AP obituary.
AND ANOTHER: For more on the substance of Dworkin's jurisprudential views, and questions that have been raised about them, see my review essay of one of his recent books and a book of essays about his work.
DWORKIN ON EQUALITY: A useful, short summary of his influential position.
DWORKIN ON THE UNITY OF VALUE: A Philosophy Bites podcast.
SPIRITED PHILOSOPHICAL POLEMICS: Dworkin had many lively debates (with Richard Posner, G.A. Cohen, H.L.A. Hart, and others), but this famous one is on-line: Blackburn vs. Dworkin on the objectivity of ethics.
AS A LECTURER: Dworkin was famed for his skill as an extemporaneous speaker, and YouTube offers many fine examples. Here is but one example, a brief talk on equality at the Carnegie Council. But there are many others.
WIKIPEDIA DISASTER: Someone just called my attention to Dworkin's entry, which is pretty poor, even by Wikipedia standards for philosophy. Its description of his views ranges from partly accurate to inaccurate, and it is woefully incomplete in terms of the range of his work. Maybe some ambitious person can fix it up!
ANOTHER MEMORIAL NOTICE from the Oxford law faculty. The quote from John Gardner, the current Professor of Jurisprudence, is a classic of implicature!