Should police need probable cause to request mobile-phone location data?

There are currently no firm standards on the kinds of Fourth Amendment protections that should apply to cell phone tracking data. This is becoming an issue as GPS and other tracking technologies have been added to cell phone to satisfy E911 requirements, and as police agencies have discovered the potential benefits of mobile-phone location data.

Applying the Fourth Amendment to data in the cloud

In a Note called Defogging the Cloud: Applying Fourth Amendment Principles to Evolving Privacy Expectations in Cloud Computing, David A. Couillard explores the potential applicability of the Fourth Amendment to data stored in offsite servers: spreadsheets in Google Docs, accounting data hosted on FreshBooks, and pretty much everything synced through DropBox, just to name three example services.