Last week Sparkfun Electronics announced a new, open source cloud server application called Phant. Phant acts as a logging tool which allows any device to read and write data to and from the service. Additionally, Sparkfun also created data.sparkfun.com, which is a free service running phant. This service allows anyone to save up to 50MB worth of data to the cloud, allowing 100 pushes over 15 minutes, which averages out to a push every 10 seconds or so.
To send data to and from the service, you just need to register a new stream. Registering gives you a private key and public key for accessing the data. A private key is required to update that stream, while a public key grants access to any other stream on the service.