MSI have released a Foldable Universal Bluetooth Keyboard for Palm OS, Pocket PC, Smart Phones. Measuring 285 x 98 x 12mm (approx.) and weighing only 184g, it is compatibe with:

• Palm Smart Phone and PDA OS version 5.0
• Microsoft Smartphone 2003 OS
• Pocket PC 2003 OS/Mobile phone edition 2003/WM 5/WM 6
• Symbian Smartphone User Interface series 60 and UIQ OS
• and more…

Read a review here: http://nexus404.com/Blog/2009/01/21/bluetooth-folding-keyboard-for-handhelds-msi-bk100-bluetooth-keyboard/

And read more here: Foldable Bluetooth Keyboard for Handheld Devices