OK, all appear to work on the PS3.  I'll confirm on the XBox soon.  Still, no dice on my Samsung LED (using Media Play).
I have the following structure:
Volume_1/joe        <-- me
Volume_1/susan    <-- Susan
Volume_1/shared   <-- ALL
So, the only available folder on my TV, XBox or PS3 is Volume_1/shared.  Within that folder, I have:
Volume_1/shared/music
Volume_1/shared/pics
Volume_1/shared/videos
From my TV, it shows a really strange structure (for Media Play->Photo, similar issue for Music, Video):
Media Play->Photo/Video/Folders/shared/pics/{albums}
Media Play->Photo/Video/Video   <- this redirects to above Video folder
Media Play->Photo/Video/Video   <- this redirects to above Video folder
When I choose an album within ./pics, it shows no pictures.  I then back out to the Video folder, and now it shows:
/Volume_1/shared/pics/{albums}
and I can see the picture icons but after a while the TV gives me an error: "the request cannot be completed" and boots me back to the Media Play menu.
I run into similar problems with Video and Music.  I have to find some wormhole in the folder structure (starting with Video, Video, Video as an option) to even get to the files.  Turns out I am able to play music.  I can play video, but a simple AVI (taken from my camera) gives me an error: "not supported audio."