Wireless Redstone brings the the ability to build redstone mashines without lines between them to MC. The mod comes with a transmitter and receiver, and serveral tool like remote controls, sniffer and triangulators.
A cool feature is the option to trigger redstone inside a plane or car while driving via the remote.
6. Known Problems: Requires Item-IDs 6246, 6243, 6244, 6245 and Block-ID 126, 127, 128