This could already exist somewhere in here but I thought what the heck! It's called Throttle Lock and it is the best and most visually impressive screen locking program I have come across. To me, this screen locking program makes the Iphone's locking software (If it doesn't have this) look childish.
You can get it here. I've installed it on my phone and I love it. I did notice some issues when I had the
accelerometer option switched on... it worked with the
accelerometer but after about 5 mins of playing with it, my omnia became really sluggish. I downloaded the latest build. All in all, a great app.