I think that having the option for text, icons, or nothing at all would be the most flexible.
Personally, I prefer just the date/time and the slidelock on the screen so nothing covers up the background.
...also, one minor note... For us VZW folks, the banner at the top of the screen runs into the lock icon (see pic)
And thanks so much to andason, yuma, and all others that have worked on this great app!
