Will the GS400 have a clunky OIS? Is the GS100's clunky? What I mean is that everytime you tilt or move the cam from side to side when it is not turned on, you hear, "Cluck. Cluck. Cluck." :-))

The GS100 has it but its barely noticeable.

The MX300 has it and it's kind of funny. At first I didn't notice it, I thought it was lens cap or the strap or something. I wonder how those 24P owners are coping? :-))

I grabbed the lens cap thinking the same thing.

yeah the noise on te gs100's ois freaked me out too when i first head it, but then i remembered reading new dvx users post's freaking out about the same thing.
It's more of a slight clicking sound on teh mamba.

Clunking, clicking, clucking..., "cheep cheep---chirp," it's all chicken to me. :-))