Originally Posted by mudilik
I am no expert, and you should definitely check out the HacktheIbus remailer, but, the IBus allows as many devices on it as you can think, though I guess it might be limited at some point based on the available addresses, but your car is NO WHERE NEAR THE MAX. As for another I-Bus connector, here is the deal. Everything that connects to the I-Bus has the connector. The reason people use the CD changer is because it is convenient and available when there is no changer installed.
I have never heard of a "Y" cable for the connection, but I guess it is possible. You could always make your own Y cable. IN fact, there are numerous ways to accomplish this, it is just a matter of how ingenious you are. You can think of the I-Bus connections as the same as a power connection, Positive and ground. You can have as many as you want, you just have to get the "right" connectors and do the wiring.