So I set up VirtualBox 4.0.6 on my Ubuntu 10.10 x64 host to run Windows 7 Pro x64, and it works pretty well with a few issues. One issue is that shared folders do not show up in my guest OS.
What I've Done So Far: I installed the Guest Additions to no avail. I setup "/home/brian" as my shared folder, with Auto-Mount set to "Yes" and Access set to "Full" in the Shared Folders popup (from clicking "Devices > Shared Folders..." in the guest window. In the Edit Share popup (from clicking the yellow Edit button in the Shared Folders popup), I can confirm that the folder path is /home/brian, the folder name is brian, and that Auto-Mount and Make Permanent are both checked on (Read Only is off). I noted in another somewhat similar post here that setting my ethernet adapter to bridged instead of NAT might help, but it hasn't. I read the user manual and can confirm that I followed all instructions correctly. The manual says i should be seeing the shared folder come up as a letter-assigned disk partition in My Computer, but it still does not appear.
Any ideas? Thanks guys.