If one of your New Year's resolutions is to finally launch that DNA project you've been pondering -- or maybe to better organize and orchestrate the one you're already running -- you'll want to check out this page at ISOGG (International Society of Genetic Genealogy -- an organization I happen to be a big fan of):
DNA Project Communication Methods Comparison
It has just what it says -- example after example of different DNA projects and a summary of how they've opted to communicate with their project members -- including links so you can see and compare for yourself. A terrific resource!