Brainslayer has released a new Alchemy branched version of the DD-WRT Firmware for the Linksys WRT54G/GS Router. the changes are as follows.

prefinal3.2:

site survey fixed
wrt-radauth enhanced with portal function for unauthorized users
wds-watchdog nvram initialisation fixed
various web bugs fixed (thx Cesar)

for more info and downloads check out the
DD-WRT Website