I use Tellstick duo with a Raspberry Pi with Linux on it. Add Telldus as a valid repository for programs and applications.
Install the tellduscenter (it will resolve and add the other needed packages, like telldus-core)
Run TelldusCenter and configure your devices and sensors, activate Telldus Live, then go to Tellmon and enjoy graphs and history. Will need a network access of course, I use a usb-wifi-dongle for the Raspberry to connect to my WiFi access point.
Thanks for the tellmon service, by the way.