Mobileburn compared some Bluetooth keyboards for cell phones. They compare the ThinkOutside Stowaway, Nokia SU-8W and the Freedom Input Freedom Keyboard:

Enter the Bluetooth keyboard. For those of us that rely on our phones for email while out and about, we know how tedious replying to email can be when using a numeric keypad and a predictive text system like T9 or iTap. Surely those systems are better than the old triple-tap method, but they are no match for your good old PC back on your desk.



Link: Mobileburn