OK - I think I have a fix (from a good friend of mine who works at Verizon). Goto Application, All and Multi-touch keyboard. Force stop it and clear cache. Reboot. I did that this morning and the phone has been working fine all day. Let me know if this helps!
Edit: He also suggested turning off the Next Word Prediction - Settings / Language & Keyboard / Multi-Touch Keyboard Settings / Next Word Prediction ... turn it OFF
Edit: He also suggested turning off the Next Word Prediction - Settings / Language & Keyboard / Multi-Touch Keyboard Settings / Next Word Prediction ... turn it OFF