I've got the auth server built with all of the modules/features enabled. The older ipkg installed nicely on my ancient WRT54G. The gateway works nicely (though I did lose some spouse points during the install) and seems to respect the pre-existing port-forwards. I don't see much of the previous notes changing all that much. I'll start tweaking them this weekend.
One side project though, the documention. The current stuff is a bit sparse.