I liked the concept they presented in the article. Although I m not a BIG tech savvy, however I think the concept and ideas are very promising.
Good points
1) Reliable: Adeona uses a community-based remote storage facility, ensuring retrievability of recent location updates.
2) Private: Adeona uses state-of-the-art cryptographic mechanisms to ensure that the owner is the only party that can use the system to reveal the locations visited by a device.
3) Open source and free: Adeona's software is licensed under GPLv2. While your locations are secret, the tracking system's design is not.