Hi Tjelum and Guenther,
Another user has started a Linux library to talk to the Mooshimeter. It is still very early in development, but it can connect and read values off of the beta firmware, right now available only through the Android beta.
The library is here:
He has it running on Arch Linux. To run it, you need one of the latest versions of Bluez, the linux bluetooth stack. And you have to run it with the –experimental flag.
Hope this is helpful