Japanese megasite DC Watch has a new DIY post. This time, they are providing their own custom hood for the Ricoh GRD III. See it all at this DIY post at DC Watch Impress.
PS: Do not try this at home unless you really know what you are doing!
RAWsumer reviews at the Compact Reviews Organizer
CANON: G11 S95 G10 G9 S90 SX1is
PANASONIC: LX5 LX3 LX2 FZ50 FZ100 FZ40/FZ45 FZ38/FZ35 FZ28
RICOH: GRD III GRD II GX200
SIGMA: DP2 DP1
NIKON: P7000 P6000
CAMERA DIARIES: Panasonic LX3 Canon G10