Rumor is going around that Google is planning to launch its own cloud storage option that would rival Amazon’s S3. If the rumor is accurate, the service will be called Google Storage for Developers (GS), allowing app developers to host content for themselves or other users online. The service will initially be available in a private beta and Google will be making it easy for existing S3 customers to make the switch. Users will be allowed to use Google accounts to offer authenticated downloads, as well as manage their data via a command line tool or web interface. With Google’s I/O conference set to start real soon, you can be sure that will be the place that this service would be announced.