Anyone interested in a simple RF (or Bluetooth) project?

I've got a simple widget that I need designed for me, and I think BlueTooth is the way I'd like to go.

I need to develop a wireless device that only has one function: a button.

The unit will be "connected" to a receiver, along with 25 other of these devices, and used as a buzzer game for kids.

The primary concern is cost.

I'm not stuck on BlueTooth, but the idea for blue tooth was to keep from having to build a receiver, since USB Blue Tooth dongles are readily available for under $50 these days.

The other thought was to reproduce the guts of an inexpensive wireless keyboard, and use its receiver...basically sending a differnt "key" to the receiver for each button. The problem with the typical 900Mhz wireless keyboards and mice are transmission lenght...typically around

I'm interested in finding someone to build these gizmos for me in the next few months.

Thanks Eric Robishaw