WRT54GS and NoCatSplash

[NOTE: I've apparently been sending to nocatnet, rather than nocat. I am
resending this message to this list. In addition, I've since established
NCSplash on OpenWRT. My primary question now is, what experience with
performance has anyone out there had under heavy load? Does NCSplash handle
well with lossa folks on and off in a short period?]

I have been trying to implement NoCatSplash on a WRT54GS. My scenario:

Coffee shop next to major university.
High traffic, with as many as 300 machines on and off in a 6 hour
period, at peak.
Single WRT54GS handling the network.

What I need:
Open-portal solution independent of an external server. NoCatSplash
would seem to fit the bill. Understand that, in this case,
authentication is what we are trying to avoid.

What I'm asking:
Has anyone on this list either had experience with, or been made aware
of, an instance of NoCatSplash on any of the WRT firmware
implementations in a production environment?
If so, which firmware?

If not, is anyone aware of an alternative open-portal solution that is
stable on the wrt? What I've seen [Chilispot, wifidog, etc] all seem
to require authentication, and off-wrt auth at that.

While I'd prefer to stick with what we have, if there is no such as
the above, what, preferably self-contained, distributions provide the
quickest path to implementation on an alternative platform than the
wrt?

Much thanks,

Chris