Pachube - Platform for Internet of Things

Pachube, a realtime data brokerage platform for the Internet of Things, provides most of its functionality via its Application Programming Interface (API), rather than via the website itself. The API makes it quick and easy to create products that connect to the Internet of Things by offering sophisticated realtime data, history and user management tools for sensors, devices and environments around the world.

Openness of data is unclear and is only available via the API (not in bulk).