In an important decision, the Court of Appeals for the Federal Circuit has rendered many broadly written software patents invalid under 35 U.S.C. § 101 as interpreted by the Supreme Court's recent
Bilski v. Kappos decision from last year.
The new case is called CyberSource Corp. v. Retail Decisions, Inc.
The Patently-O blog has a useful summary and analysis of the decision here:
http://www.patentlyo.com/patent/2011/08/if-the-software-method-is-not-patentable-then-neither-is-the-computer-readable-medium.html
The PDF version of the decision itself is here:
http://www.cafc.uscourts.gov/images/stories/opinions-orders/09-1358.pdf