SCO are suing IBM for a billion claiming that they used UNIX technology to improve Linux. Some speculate that due to the decreased revenue in UNIX that SCO will make up for it by suing others. Have a read here:
http://www.ofb.biz/modules.php?name=News&file=article&sid=216 the complaint is here http://www.sco.com/scosource/complaint3.06.03.html
