I use synergy http://synergy-project.org/ a lot to switch between an OS X and a Linux computer. Synergy allows users to share a single mouse and keyboard between two different computers, seamlessly moving from one to the other by moving the mouse. It is incredibly intuitive and useful.
Unfortunately the keyboard capturing behaviour of your products (I’ve only tried TotalFinder and TotalTerminal) are incompatible with this product. Is there any way you could look into this ?