Attention: Only Mac client is supported, PC is not going to work.
The Typing app can help you type a lot of words on iPhone easily.
Here is how you could do it:
1. Go to http://blog.jeswang.org/works/ download the Mac Client.
Here is the direct download link:http://blog.jeswang.org/app/Typing.zip
2. Join your iPhone and Mac into the same wireless network.
3. Open your iPhone and Mac Typing Application and Tpying on your Mac.
4. Enjoy the quickly typing.