Hmmm - it looks like I never finished the story of my G9.
As I mentioned in fall of 2008, I sent it back for repair. When it came back, the lens cover problem was fixed, but there was still a ton of noise.
Not long after I got it back, something else went wrong - I don't recall what it was, but it required a second trip back to Canon to fix - still under warranty.
Not long after I got it back the 2nd time, the lens stopped retracting, it kicked up an error, and I shelved it after they told me I would have to pay for the repair this time.
I have heard from others that don't have any problems with their G9s, but mine was such an incredible POS, I haven't given Canon any $$$ since.
Conversely, my old 300D keeps on going . . . so I'm not totally jaded against Canon - just against their PnS cameras.