I stumbled upon a VERY simple and easy method that costs less then $10.
Should work with most cameras.
In a dark corner of Radio Shack, I found a Garage Door Opener.
This was $2.50
This was perfect for what I needed.
It replaces a simple push button switch and triggers it wirelessly.
Two cables come out the top, intended for the garage door motor.
Instead, this can be used as a wireless switch for any electronics.
I used it by connecting its two wires to a 3/32mm audio jack $3 from radio shack.
some cameras allow you to plug a similar plug directly into the camera.
Unfortunately for the D300, it has some stupid special port.
I had to interface with a shutter release cable.
If you have a D300 too, buy one of these
and swap out the button for the garage door opener.
Super Cheap and Easy, under $10 wireless remote shutter.
Hope someone can use this too!