iDine has a partnership with linkshare.com where they will kick back $2-$11 per new member. This is for their cash back program rather than miles program, and is a website affiliate referral program rather than a "member get member" program (though you could set up a webpage, signup with linkshare, and get your friends to sign up with iDine using your link).

But I'm not aware of any mileage bonuses for referring friends to the mileage earning iDine programs. Would love to know, though!