Vito FunContact blows them all away by far, check out a short video
here. You can check out the longer ones with more detailed previews on that same site.
Pair that with Vito SMS Chat, and you're finally cooking with gas. There is a thread going on
here (read the whole thread) which will tell you the pros and cons of the SMS Chat if you decide to go that way.
You can also use PocketCM keyboard w/ Iphone skin (files and install instructions found
here) to make your typing experience more finger friendly.