On our home network I have been able the automatically connect a Win 7 and an OSX machine to our DNS-323 when the the machines start. The DNS-323 is always powered on and sleeping. For the Win 7 machine a mapped drive N: to point to a folder on the 323.
Because I come from an environment where every user has a unique login, password and "home" directory, this setup did not seem unreasonable. I do not know if you could map a drive on each of the 10 machines to point to the same folder on the NAS and use the user name/password of guest/guestpw. Personally, if these users were able to write to the folder, I would want to be able to track who created each file. I would also be concerned about someone deleting the wrong file.
Try creating the common folder on the 323 and setup an account/password on the 323. If you can map a drive to this network folder on two machines, you may be able to do what you want.
Hope this helps.