Limited samba support
Since 18.104.22.168-5 Samba 1.9.17p5 is included but, not enabled by default.
Important notice: the samba is totally unsupported, use on your own risk!
* Be sure you've specified hostname in the LAN IP Setting (this name will used be by samba)
* add the following to your /usr/local/sbin/post-boot script):
Once you've rebooted your wl500g should appear in workgroup called WORKGROUP and present you a share named "share". This share is read-only view of your usb drive (/tmp/harddisk/). There is also second invisible share called "share$" which is in the fact the read/write view of /tmp/harddisk/. No other access restriction present.
There are log files available for samba - /var/log/nmb and /var/log/smb, they could be examined if something does not work.