The SCO case revolves around intellectual property. SCO says that there is a large amount of SCO code that has been inserted into the Linux kernel without their knowledge/permission, and are therefore seeking to charge a license fee for Linux because of this. However, they refuse to prove which bits are illegal.
This dispute seems to be more about competition and contracts. However, I don't know what the exact dispute is and who the parties are, other than the speculation in the article and comments.