not that i know of but you might want to try the qSMS app. i have it set to a convenience key so that when i want to text, i just hit that key and it brings me to my contact list and i type the first letter of their name or whatever. it saves the time of going through all the menu steps to send a text
Sounds like potential for another app someone could develop. I would love an ultimate texting app that adds texting speed dial, threaded SMS messages, and the ability to automatically split messages greater than 160 characters!
I predict whoever comes up with that app makes a lot of money from storm users.