The Freedom Plug is .... insert links...
The Freedom Plug is based on the GNU/Debian operating system. It is not a Linux distribution. It is a network appliance that depends on a series of Debian packages that configure a plug computer to behave as a Freedom Plug.
Plinth is the web-based GUI administration front end for the Freedom Plug.
The current targets are the Guru Plug and the Dream Plug.
If ssh listens on port 2222, bots and scripts will forever attempt to guess your username and password. Maybe your password isn't so strong. Maybe the bots get lucky. Either way, if you allow ssh access on port 22, you're taking a chance that can be avoided quite easily by moving your ssh activity to a slightly more obscure port.
Because ssh activity on these boxes will be limited to programs configured to work specifically with Freedom Plugs as well relatively few people generally using ssh, the coordination necessary to use a non-standard port is easily achieved.