Note: another interesting service for declaring and sharing data… through the cloud. Possibly the most simple we went through. Dweet.io.
Also to be mentioned with a similar goal but more complete/complex, OpenRemote.
With a new service called Freeboard, Bug Labs is giving people a simple one-click way to publish data from a “thing” to its own Web page (Bug Labs calls this “dweeting”). To get a sense of this, visit Dweet.io with your computer or mobile phone, click “try it now,” and you’ll see raw data from your device itself: its GPS coordinates and even the position of your computer mouse. The data is now on a public Web page and available for analysis and aggregation; another click stops this sharing. (MIT Technology Review)