Linux NAT/gateway distro

[Ross Werner]

I'm looking for a Linux NAT/gateway distribution that:

a) does dial-up
b) is easy to set up (I'm thinking "install distro to hard drive, type in 
phone number and username/password, done" sort of easy)
c) does on-demand dialing (so it doesn't connect to the internet until 
somebody on the local network opens a web browser or whatnot)
d) maybe even some sort of remote (web-based?) interface to disconnect if 
the user doesn't want to wait for it to timeout

Any suggestions?

Thanks in advance,
 	Ross