yea i just picked up the RC2 a few days ago, hope to get to test, not installed yet. I primarily like the fuction of WHS for adding disks/volumes. I'm not really looking for a network backup feature, or a domain controller. Makes the home feel like an office or library imo. But i'm still up in the air about what and which way to go.
All this could be seemingly fixed easily by just adding the simple network/HG user account limits and privs while still working on the HG/libraries.
The only way i have thought up of doing so lately would be to go ahead and add the share/library to HG, and the included libraries (that would have to be on different disks in this case), then restrict user disk access to the disks that have the included shares that you dont want each user to see. Thus when clicking in the video library, and having one disk hosting for each group of users i would "create" the "policy" for. Like one disk would have content for "Everyone", the other disk would have content to "tier1 restricted things" ie; non G rated stuff, but not R. Then seperate disk for mature/R content. In this scenario, All 3 disks could host pics, music, video, etc, just at different "levels" made for the per user disk access.
All of this would have to be setup on ONE pc, with all duplicate accounts on the network created on this pc, all disks/shares indexed, and "share with" Homegroup could then be selected along with the underlying disk/partition restriction. Not sure you could do this per folder, i have only found the way for the \root of the drive.
This is just another brainstorm type of last resort idea for now.... not sure if it will actually work as i havent tested with working HG, this is in theory.