Debian on QNAP Turbo Station
Debian supports all Orion based QNAP Turbo Stations. This includes the TS-109, TS-209, TS-409 and TS-409U. The QNAP Turbo Station was the first Orion based device supported in Debian and works very well.
There are additional pages with instructions and information about all supported models:
There is currently also work progress to support QNAP's new Turbo NAS devices, which are based on Marvell's new Kirkwood chip.