Keyboard alternatives

[Josh de Lioncourt]

My girlfriend may be getting a Mac Mini in the near future and was  
asking for something that I'm quite sure must exist, but which I can't  
find a suitable product for.  She's hoping to find a compact, portable  
USB keyboard to use with it.  Something smaller than the standard  
Apple keyboard, but with Apple compatibility, so that the Command key  
etc are placed in the right locations.  Even a clever USB keyboard  
that folds up, which I've seen before would work, but preferably  
something meant specificly for use with a Mac.  Anyone ever heard of  
such a thing?  Thanks!