People have suggested a number of examples of prior art which we can use, but we are still looking for more.
A key part, however, is that prior art be exactly covered by the claim: Each part and step has to be present. For example, consider claim 1 of the 6,530,329 patent:
1. A method of operating a digitally controlled model railroad comprising the steps of:
(a) transmitting a first command from a first program to an interface;
(b) transmitting a second command from a second program to said interface; and
(c) sending third and fourth commands from said interface representative of said first and second commands, respectively, to a digital command station.
If you can spend some time writing one of these comparisons, please contact us by email. We'll provide you with some examples and help getting started.