If you want everyone to be able to mount it, just leave all of the client fields blank, but still have the exports entry.  By default, that generates the (everyone) you see in showmount -e.  The problem before looks like there wasn't an entry for your directory.
We have just installed and configured a new Isilon and I'm try to create some CIFS shares from AIX to the Isilon.  I can't figure out if the problem is with AIX or the Isilon.  I have other CIFS mount set up to Windows servers already so I don't think the issue is with AIX.  This is the error I get when trying to mount the file system.  nfsmnthelp: 1831-019 cotx-isilon: A file or directory in the path name does not exist. mount: 1831-008 giving up on: cotx-isilon:/test_fs1 A file or directory in the path name does not exist.   Is there any documentation on how to do this or has anyone here done it before and can give me some pointers?  Thanks, Eric
Creating CIFS mounts from AIX to the Isilon