This is a little different in that it's USB, but could be very useful:
http://www.hagstromelectronics.com/keusb36.html
The advantage of something like this over connecting pcb tracks is that it allows you to program a combination of keys from a single button, so you could add a button to your transport that does Copy (ctrl/cmd)+C, for instance.
If anyone knows another way of doing this (key combinations), please post... :wink:
Dan