I was going to buy a 1Gb xD card for my Fuji camera but decided to check with Fuji due to the 'slow response' and other problems reported by some reviewers. For Fuji cameras go to their UK support area [at fuji.co.uk] and follow the link to 'will type H or M xD cards work in my camera' - this will show which Fuji xD cards your camera can use. This 1Gb card, being Fuji, won't work with an Olympus camera's auto-stitch panarama camera function, although it should still capture pictures provided that the Olympus camera is compatible with the Fuji xD card's size [Gb] and speed [M/H/M+].
Fuji's on-line compatibily chart states 512Mb max for mine and many older models. The only firmware upgrade for my model is for PixBridge not larger Xd cards. To be safe I ordered a Fuji 512Mb xD type M branded card instead, which Fuji state as the largest capacity for my model (and it works fine). Without doubt this also applies to Olympus cameras and their xD cards, so check with their support. All this is pretty essential if you have an older camera that was bought before 2007. Note that type M is normal speed and type M+ and H are the the newer faster high-speed xD transfer cards (1.5x and 2 to 3 x faster respectively) - again not always compatible with older cameras that can actually take a standard type M 1Gb xD card. Likewise newer cameras may accept a 2Gb type H xD card as well, which might be more tempting. Beware of storing all your snaps on one xD card though say during that holiday of a life-time, as if you lose your camera on holiday, all your photos could go with it. Also, all xD cards are pretty lethargic, so if your camera offers two card slots, investigate the other format as well.
So overall 3* - although now that 1Gb xD card prices have plummeted from £80 plus to nearer a tenner, it's far less of an expensive mistake buying one today.