Heheh, don't take my advice as proven information, we may have just been unlucky, but I have encountered alot of people with problems with those camera's.
Anyways, the crappy photos come from the camera's shutter speeds/blurryness/nasty compression/zoo rendering style and so on.
I don't mind Olympus, but I really don't like Fugifilm, and the reason I prefer SD and CF cards over XD is:
A)can have larger capacity
B)MUCH faster, and when you are taking many large images, despite what some people think, the speed of the memory does count
C)Compatability, SD and CF are used in most devices these days so that can help if you want to share it among your devices, it can also be handy when you want to display them on other people's camera's/phones/pda's and what not (you get the point)
Basically, i'm sure Fugifilm and Olympus make some nice camera's, I have just had a really bad experiance with them