Closet thing I can think of is Screebl... while it won't do exactly what you want you can set the time for something ridiculous (60sec) which would ensure it wouldn't go off. The other thing is to check with the "we hate the lock screen" group/thread (do a search) and see if they have some suggestions.
I can't figure out which version I'm supposed to have. But it's nice to know that there are others with the same problem. Went to a Verizon store tonight before I found this thread.