#13823, "RE: Not sure what this is...." In response to In response to 2
It could be a bad motor mount, or (much less likely) your CV joint is starting to go bad. They are both easy enough to check. Just take a look at them and see if the motor mount is starting to tear, and see if the CV joint boot is still in one piece.
I'd take a good looks at the motor mounts. They usually cause a car to make noise like that when accelerating, decellerating, making corners, ect...