backlight delay still happens for me, but not all the time.
I've noticed that when the screen shuts off and you press right away, it's responsive.
Leave it for 20 min and press the trackball, there is a delay. Not as big of delay if you unlock the keyboard (* + phone) instead of using the trackball to engage the screen.
Only problem I've seen so far.
drunk half the time;
other half i'm trying to get drunk