Mac Specific Keyboard

I am looking to buy a ergonomic keyboard that has the Mac specific keys, not a PC/Mac keyboard. Does anyone know of a wireless one that is reasonable in price and would be better if it was wireless. A combo with mouse is fine also.

What about this? Logitech diNovo Keyboard Mac Edition Keyboard reviews - CNET Reviews
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Hardware for Your Mac: Mice and Keyboards | Mactopia (are you sure you don't want a hybrid?).