If not for RSI it just gets uncomfortable typing on those tiny mobile devices. Following is the list of keyboards which can help you type better in almost all situations.

First the regular Keyboard with additional features

Natural® Ergonomic Keyboard 4000

Offers Zoom button, Customizable Hot Keys, Improved Number Pad, Ergonomic Design, etc.. Click here to buy.

Ergonomic Keyboards:

Goldtouch Adjustable is one of the most common ergonomic keyboard you will see out there.. it breaks from right in the middle and adjusts horizontally and vertically to match your comfort. Click here to buy.

There are a gazillion other ergo keyboards available, click here to see a few of them.

Optimus Maximus keyboard

Completely customizable layout allows use of any language, character sets: Notes, numerals, special symbols, HTML codes, etc.. Click here to read more and buy.

Optimus Tactus keyboard

This is a concept keyboard, not a real product yet. Optimus Tactus does not have physical keys, which means there are no restrictions on their shape and size.

Text Mode:

Video Mode:

Asus EEE Keyboard:

This is not just a concept. The keyboard was on the stand at CES 2009 but isn’t up for sale yet.  Click here to read more about it.

Duraflex Flexible Keyboard: This is the best keyboard you can use if you are on a nature trip. Foldable, Spill resistant, Washable, etc.. nature of the keyboard will make sure its safe no matter where you keep it.  Click here to buy.

Small & Flexible keyboards for Mobile Phones:  Smart Fabric Keyboard from Eleksen lets you fold it and take anywhere you want to. The Bluetooth capability hooks it on with mobile phones making it easier to type.  Click here to buy.

BTKeyMini: Keyboard for iPhone is not a reality yet. A compatible keyboard is designed and developed by MacAlly and will start shipping in March. Click here to buy one.