Slashdotted today an article regarding the latest suit against IBM, Red Hat and Novell for antitrust. According to the news, the GPL and Open Source are not concerned by the antitrust issue filled against those companies :

Internet Cases reports on a new decision from a federal court in Chicago holding that 'the GPL and open-source have nothing to fear from the antitrust laws.' The suit was against IBM, Red Hat and Novell, arguing that by distributing Linux for free, they offered products at an unbeatably low price (free), thus discouraging new market entrants and stifling competition. The court took a different view, focusing instead on how the GPL fosters new development