Hello, I've got the same problem with my new Samsung LN-R409D, installed in our bedroom. There's nothing in the owner's manual about turning off the blue ring light. A poster on C/Net said to try: "Menu/Set-Up/Blue-Eye Turn Off" but that appears to be for the relatively new ambient light sensor. There was no such available path for my set for the on/off blue ring light.
It's possible to enter the bottom of my set, where the central pedistal stand installs. There is a cover-box there, located over the on/off switch. I didn't want to goof with it, on a brand new set, and screw up the warranty.
I emailed customer service at Samsung, but got no response. It appears that they are proud of the damn thing. Maybe they don't sleep!