The Supreme court ruled against file-swapping software companies that actively encourage swapping of copyrighted videos/music/software/etc.

As long as the companies manage to stay on the side of the line that doesn’t “actively encourage” such swapping, they should be safe. This is a risk some companies and software distributors are willing to take, and some aren’t.

This ruling only applies to companies in the United States. Companies outside of the United States are not restricted by Supreme Court decisions or copyright laws, and will continue to offer such software if it pleases them to do so.

CNET news originally had this story.