The Bilski case, now before the Supreme Court, is likely the most important case regarding U.S. patent law that the Court has considered in many, many years. (Sorry, fans of KSR v. Teleflex...)
In Bilski, the Court will decide upon the allowable scope of patentable subject matter for business method patents - a decision that could arguably invalidate numerous patents already granted by the USPTO. The patents at risk of invalidation include patents held (and relied upon) by some of the world's leading technology companies, as well as by any number of non-practicing entities (NPEs).
On November 19, 2009, the Program on Information Justice and Intellectual Property at American University's Washington College of Law will offer a webcasted seminar regarding the oral arguments made to the Supreme Court in the Bilski case. Details on the seminar are available at http://www.wcl.american.edu/pijip/go/bilski-nov2009. The seminar promises to be quite interesting, and I would encourage everyone to check it out.