As a Marxist, I am always interested in intelligent commentary on the usefulness of Marxism as an effective tool for economic and sociological analysis. I found a series of related links on Crooked Timber's blog, and thought them worth posting.
http://crookedtimber.org/2011/06/19/marxism-without-revolution-class/
http://crookedtimber.org/2011/06/25/marxism-without-revolution-crisis/
http://crookedtimber.org/2011/07/01/marxism-without-revolution-capital/