This is my current set up.
I edit all photos from my DSLR and my wifes P&S camera on my desktop in lightroom. All the raw files are saved as raw and not exported as raw except those going to flickr/facebook. Once everything is done, I then copy all the files over to my wife's computer over the network where she views them in Faststone viewer.
the problem here is that she's complaining about how slow it is due to the size of the raw files when moving from image to image. Also she's not impressed with the image quality - essentially she sees the unprocessed raw file. I don't export .xmp files and even if I did faststone image viewer doesn't read them (I tried).
One reason I like this set up is that I've got a back up of all my photos on a separate drive/computer for backup. Obviously this isn't working for my wife as the image quality and speed isnt' working (she's got a core2 and 4gigs of ram so it's not her computer).
Any thoughts on a better way to approach this? is there a free/cheap image viewer that reads raw files and .xmp? would prefer to not add .xmp files if I don't have to and that's one of the reasons I like lightroom.