I too like mailing list, but most of the mailing list software I have seen isn't that great. Essentially, it would be like a glorified Google Groups which I am not a fan of. They are prone to spam and often leak your email address. I could see a modern system working with remailer support built in, but at that point it isn't much different than a forum. It is essentially Usenet, and at this point I'd rather see Usenet make a comeback.