I've been playing with Arduino microprocessing boards lately, making 
LEDs blink, that sort of thing. One thing I've been trying (and failing) 
to do is to use an Arduino to build a radio around the Si4735 
radio-on-a-chip from Silicon Labs. I was on the site of Sparkfun 
Electronics last night and noticed that they've created a shield (in 
Arduino language, that's an add-on board that piggybacks on top of the 
Arduino board) with an Si4735 on it. So I ordered one.

http://www.sparkfun.com/products/10342

The chip is roughly the same one used in some of the most recent 
ultralight radios from companies like Degen and Tecsun. It has a 
surprising number of features, like multiple filters from 1kHz to 6kHz.

I hope to have the board sometime next week. I'll let you know what I 
think of it once I get it running.

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Guy Atkins

Puyallup, WA USA