Build simple rf reciever?

Does anyone know how to build a simple radio reciever?

All i want from the reciever is for it to recieve a oscillating radio frequency, and as it recieves it it sends a signal through a wire somewhere.

http://www3.damien.edu/students/mskim/shortwave.html

any idea how to build a simple FM radio transmitter? all what i found were complicated ones.

i want to broadcast the computer sounds (winamp/mp3) to any FM radio in the house, not longer (10-20 meters will be enough)…

Doesn`t Radio Shack have any FM transmitter kits?

Over here in the netherlands, you can get a FM Oscillator kit for about €15,-the brand name is Velleman. (a belgian kit company)

they work fine, with a limited range.
and it has a microphone input.

funny really, because FM transmitters are illegal over here…