I have a WRT54GL running
Tomato Firmware RAF1.28.0002 MIPSR1_reduced_bufferbloat-2limit K26 MiniIPv6
Linux kernel 126.96.36.199 and Broadcom Wireless Driver 188.8.131.52 updates,
support for additional router models, dual-band and Wireless-N mode.
Copyright (C) 2008-2011 Fedor Kozhevnikov, Ray Van Tassle, Wes Campaigne
However I normally don't use the WiFi portion of the router, as I have a 802.11n AirPort Extreme that I use for wireless access for my own devices. However, when we have guests/visitors, I would like to be able to turn on the WRT54GL's wifi and let them use that. However, I would like to set things up so that people using the WRT54GL's WiFi are isolated from my home net (i.e. they can only get out to the Internet). I'm pretty sure this is possible as i've heard of other people setting things up in this way using Linux. Unfortunately I haven't the slightest clue as to how to set this up. I looked through the admin interface for something that might be apropos, but nothing jumped out at me (but perhaps I am missing something).
Any help greatly appreciated. Thanks!