It's Park Place, a clone of Amazon's S3 (Simple Storage Service.) It's written entirely in Ruby, with heaps of help from the Camping 4k web framework. Oh, and no SOAP support to speak of.
Queueue is a Ruby implementation of the AWS SQS (Amazon Simple Queue Service) server REST API. Queues and messages on Queueue are not persisted, only stored in memory and are gone when the service is shut down.