With this linux kernel module you can use your old Nintento Powerpad with your computer using the parallel port.
Get the source: for 2.4 kernel
for 2.6 kernel
Note: This software come with absolutely no warranty, it worked for me it may or may not work for you, if you destroy your parallel port, controler or your life it's your responsability.
Ok, now if you got the driver working you might be wondering what to do with it. You can try PyDance a cool Dance game