Anyone have any idea about which card gives the optimum write speed for the G10? It is slow compared to my 40D but that is to be expected - but I don't want to waste money on a card that exceeds the camera's native write ability.

I don't know the write speed of my current 4GB card - it might be a class 4.

There doesn't seem to be any obvious web sites for this particular issue.

it does not support UDMA. a sandisk Ultra II will do the job w/o any issue. and yes they really don't go into the xfr speeds of these as they arent really performance products.