SheevaPlug The SheevaPlug Development Kit, as sold to me by NewIT in the UK ( http://www.newit.co.uk/shop/products.php?cat=5 ).
Here I describe what I did to make the SheevaPlug into a router/firewall... SheevaPlug:Ubuntu Router/Firewall
Follow the instructions here to add the JTAG board as a USB serial device. Note that the OS X 10.6 (snow leopard) drivers work in 10.7 (lion) too:
Once the FTDI drivers are loaded I can connect to the JTAG using screen:
Simple screen commands: