This is an important decision not only from a "piracy" perspective but from a "privacy" and "information security" view as well. Many US laws and regulations revolve around protecting personally identifiable information (PII). If this judge's conclusions stick then we have some freedom from having to protect IP addresses, which show up in just about everything we log and collect.

That could be gigantic to those who deal with HIPAA, PCI, GLBA, etc. Although I guess this has no impact on the European Union regulations and what they consider PII -- those are much tougher to deal with anyway.