The Seattle based Swype first launched its keyboard in 2008 and it will soon be on over 100 million devices. Nuance owns the rights to the T9 predictive text app that is still used on many featurephones today. Ironically, the T9 keyboard was developed by Cliff Kushler who co-founded Swype.
For those who have been under a rock somewhere, check out the video below on how to use Swype.
source: Uncrunched via AndroidCentral