Have you seen this yet http://www.TheViralSecret.com/10291 ? It's a free viral list builder. It is actually free and it actually works! I got 88 new subscribers to my http://leadmetomoney.com e-mail list in under 24 hrs! you can see that on youtube. It is absolutely free if you don't go for the upsells
interesting concept.. sounds like applying MLM principle to list building.. it may just work... make me think of banner ring, web ring in the old days.
Kinda like the MLM but no money out put so nothing to lose. As I said I joined it and it definately works but only time will tell if it will actually lead to sales...