The latest snapshot build of Cyberduck for Mac & Windows allows the configuration of access logging for Google Cloud Storage. The Info panel lets you choose the target bucket for log files to be delivered to. The logs in Google Storage are available in 24 hour intervals.
In addition to the existing cloud storage providers Amazon S3 and Rackspace Cloudfiles, support for the recently announced Google Storage is on track. Interested parties having access to the currently invite-only service in Google Labs are welcome to give it a try using the latest snapshot build of Cyberduck.