What type of beeping? Other than the shutter sound and mirror slamming down, I get no noise after I turned off the beep in the menu.
Although, I think I have a slight issue with my lens, when I have IS enabled and half-press the shutter, it emits a rather quiet but high pitched buzzing noise, could that be what you're referring to? I'm not sure if that's a fault with the lens or if it's actually supposed to be doing that..