Even I can now control the world outside my computer. With the USB interface board K8055 from Velleman, Belgium, you can access to the board via DLL. It´s easy to use i.g. in VisualBasic Express. (I did so last night – faszinating!) That reminds me on old Commodore Plus/4 times!
I tested it on a Windows XP system, but it also should work on Linux. Now let´s see, what cases I´m going to resolve. :-)