Sponsored web browsing (remind me of any)

Hello list,

Could somebody be so generous to tell me the names of the companies that are providing the free sponsored dial-up access asking users to watch the advertisements of the sponsors in special window?
I know there is some of them in Ontario (in fact I've used one for some time in my life), and also think there a number of them in the US.
It would even be much helpful if somebody could put the installation CD image of such service somewhere on ftp.....
Just need to show how it works to one of my friends.
Thank you.