http://www.plugwise.com/nl/idplugtype-f/products
Prices are pretty steep.... 125 euro for the scan and 99 euro for the sense, this is without shipment cost.....
I'll stick with my Jeenodes for now.....

Other than that the document does not even list this functionality in the actual Modules documentation section.2.17: Added Module.Temperature and Module.Humidity for Sense.