After I saw how SureType worked on my neighbor's BB, it reminded me of a program I saw back in 2002 called, Dasher.
After I read a CNN.com story I toyed around with a desktop demo using a mouse. Pearl's trackball and suretype functions made me think how would it work if they were to release a version of Dasher for BB.
Keyless entry would be cool, but you'd have to keep your eyes on the screen to navigate the character selections - no driving (ahem) or even walking! I just found the Dasher site and it has a Pocket PC version. There is even a java demo via your desktop browser if you're curious. Inference Group: Dasher Project: Home