^I was about to refer him to that thread.
You cant find it on the market, but Im sure if you searched around the web you could side-load the Sense keyboard.
As for the LED, you're SOL for Samsung phones. If youre unrooted try out noLED. It works fine. I am rooted so I can use the capacitive (sp?) buttons as backlights. If you;re interested in how to do that, Id be happy to help you out.