That's the sad part. When I turn the LCD off, the MF seems to be turned off as well. Here is how I reached my conclusion: If I turn AF assist light on, LCD on, MF to a fixed distance, turn LCD off, shoot. I get the AF assist light as well as hear the AF noise (if I listen carefully).
It seems like it would be pretty easy to fix with firmware update. The B&W is a pretty big bummer as well. I read Sean Reid's site and I feel that being able to have a B&W workflow is pretty important as well.
If I had more time, I would "hack" the firmware myself! Because I really like how the G10 feels (the grip is pretty nice). If the gripping surface is like the GRD, it would be even better.
If Canon make the following improvements to the G10, I would pay a lot of money for the upgrade,
- faster lens (f/2 or faster, I am willing to have less zoom range)
- better dynamic range, lower noise at high ISO (I am willing to take 6-8MP only)
- great MF control, maybe a lockable dedicated wheel
- step zoom like GX100/200 (makes using external VF a good option)
- gripping surface like the GRD or GX
- support B&W when shooting RAW
I might be one of the few crazies, but I am willing to pay up to $2000 for such a camera (provided that the lens is excellent). If you read Sean's site, you might agree that these small sensor cameras draw very differently. I really like how they draw and that's why I want such a camera. My D700 has way better image quality if you evaluate it technically, but I still use my GRD II a lot.
Micro 4/3 is nice but I like even smaller sensors!
A G9 owner once told me that he pre-set a manually focused distance of 10 ft with the lcd on and saved that in C1. Then, as I understood it, the camera 'remembered' the distance setting even after he turned the lcd off.
Don't know whether this held true after the camera was powered off, and then on again, and since I don't have a G9 myself, I cannot test or verify.
I'm interested in this also, as I often pre-set focus an older Canon compact to minimize lag.