Though not widely talked about, I desired to access files on the Home$ share of a Samba server from my Linux workstation. I had never come up with the syntax to do so.
Using mount.cifs to do the mount, it turned out to be simply //server/userid and no trailing $ or anything special.
Obviously I made sure that userid was the same user that was authenticating to the PDC in the first place. I did not try accessing bar's Home$ share using the ID foo, for example.
Copying my bug against ubuntu-docs here, Bug #440150:
I was researching how to connect a HP 6100C scanner to Ubuntu 9.04, and encountered these docs:
ScanningHowTo
https://help.ubuntu.com/community/ScanningHowTo
Scanning
https://help.ubuntu.com/8.04/printing/C/scanning.html