A U.S. court has found that open source software provided free of charge under the GPL does not violate antitrust laws … or as Matt Asay says “Duh!”. An excerpt from Evan Brown’s Internet Cases blog provides a nice overview:

The U.S. Court of Appeals for the Seventh Circuit has issued an opinion in which Judge Easterbrook declares, “[t]he GPL and open-source have nothing to fear from the antitrust laws.” The case is called Wallace v. IBM., No. 06-2454. [Download a copy of the opinion.] Internet Cases covered the lower court’s decision from last December here.

Plaintiff Wallace filed an antitrust suit against IBM, Red Hat and Novell, arguing that those companies had conspired to eliminate competition in the operating system market by making Linux available at an “unbeatable” price (free) under the General Public License (“GPL”). The U.S. District Court for the Southern District of Indiana dismissed the case, finding the plaintiff had suffered no antitrust injury. The Seventh Circuit affirmed.