Motorolas iBoard is a portable keyboard from Stowaway for mobile phones. Yes, phones. The iBoard (see photo), designed to work with Motorola i85s, i50sx or i55sr phones, is virtually a clone of the Stowaway portable keyboards for Palm OS and Pocket PC devices.
The iBoard certainly makes data input easier, but I couldnt imagine dropping $100 on it—let alone putting up with the bulge it would create in my pocket—for something usable only with a mobile phone.
Im waiting for a series of swappable connectors that would allow me to use the same keyboard with all the devices I might, on a particularly geeky day, be carrying along with me.