I'm not sure if it's possible but if so would be nice. Sliding to unlock is annoying. It's very hard to accidentally hit the home/sleep button then accidentally touch the screen.
The closest thing I've seen to this is a wallpaper pack you have to BUY with 50 wallpapers in it. One of them has a CLICK to unlock area where the slider usually is.
If my request isn't possible I'd be interested in knowing how to get this click to unlock wallpaper or similar for free. Thanks!