The TS-7260 is based on an ARM processor, and contains a fully functional Linux installation in flash memory. It can be obtained from Technologic Systems.
The 7260 (and 7250) are being used at Cedar Lake Design as controllers for research in solar sytem and wood gasification system design. There is a wiki here that chronicles the project.
Here are links to local resources for those using or developing projects based on the TS-7xxx family of products.