Meet the Logitech Wireless Solar Keyboard K760, the successor to Logitech's first solar keyboard, the K750, which earned a CNET Editors' Choice.
From a design standpoint, the K760 is more compact than the K750 and more closely resembles Apple's own Bluetooth Wireless Keyboard with the addition of the strip of solar cells at the top of the unit. It's sleek and stylish and will certainly fit in well with any Apple products you own. It's ostensibly designed for Apple products, but it works with Bluetooth-enabled Windows computers and Android tablets/smartphones, though it does have a Mac-centric layout with a couple of Mac-only keys.
The key feature upgrade here is something that Logitech calls "Bluetooth connectivity with easy-switching capability." What that means is you can pair multiple devices -- such as a Mac, iPad, or iPhone -- and quickly switch among them with the push of a button without having to reconnect.
To test it out, I paired the keyboard with an iMac, iPad, and iPhone. To switch among the devices I simply pressed the "1," "2," or "3" function keys at the top left of the keyboard (each has a Bluetooth logo on it). A blue LED lit up when I touched the button, letting me know I was now paired with its corresponding device. It worked flawlessly and is a nice option if you're working with a couple of different Macs or a Mac and and iPad. I don't see all that many folks using this with their iPhones or iPod Touches, but the option is there.