A simple mailing list? Yahoo sucks, don't do that. I am sure defcreative has a simple gnu mailman setup on his server or it's easy to install.Thankyou, lol and I agree... you can join up on the work if you want... im trying to find somewhere for everyone to meet that has opensource abilities with a chatsidebar... or something similar...
The reason to use a mail list is so that everyone can do work and answer the list when they get a break or answer on their own schedule, if living in different time zones.
The archive ability will let other people see what progress is being done, and may help others catch up if they want to jump in and contribute. Although you may find you don't need a lot of people to make this work in it's basic form. If people create a bit of code and then it doesn't get to be used they will get disinterested really fast.
As a matter of fact, maybe this whole thing could be a bunch of mailing lists.
I also forgot to mention that people have been "gaming" the Digg system, they have spent a lot of time figuring how to prevent it. It will happen, so try to think about it while you get this going.