To list shares that are available from the configured Samba server execute the following command:
$ smbclient -L yourhostname
You should see a list of shares available on your server. If you do not, then something is incorrectly configured. This method can also be used to see what shares are available on other SMB servers, such as Windows 2000.
If you choose user -level security you may find that Samba requests a password before it will list the shares. See the smbclient man page for details. You can force it to list the shares without a password by adding the option -N to the command line.