This one has been talked about for a little while, but I never got around to writing a post. It won't be available until March, so I think it's still got some pre-release post-worthiness. CompuLab recently announced the Exeda - a squared-off embedded device intended for enterprise customization.
Not only can customers chose between quadband GSM / GPRS, CDMA, and 3G UMTS; they can choose between Windows Mobile, Windows CE, Android, and Linux. The company hasn't said which Tux flavor(s) is/are on the menu. If you like, you can skip telephony altogether and have the strangest PDA on the block.
Not only does it have a touchscreen that can be viewed in the sun, it features a capacitive touchpad that functions as a mouse. Did I mention the ethernet port? Weird. And cool. It's like a customizable, open source Slate. Check out the specs here.