It could be a wheel bearing, disk braks pad telling you it needs to be changed. :scratchchin
A loose or bad wheel bearing will vibrate some. Its hard to do this without hearing the problem. I would look at the entire front suspension. You might have a bad tire also, try rotating the tires.not the brakes i just did them a month ago. if it were the wheel bearing would it sqeak and "grind" more instead of a lite rattle/squeak and steering wheel shake?
It very could be. But they usually show there ugly head with a pulsing brake peddleyeah im lift it up tonight in my garage and look at it. Im also thinking that it could be my rotors are warped.