On another note, Dalinore and I have been poking around in an MP game on one of the free servers. Diffently helps having at least 2 people. Being able to get a zombie between the two of you and attacking them when their backs are turned to you helps a lot.
Also, skills. If your playing as a group, you want to decide which skill everyone is taking early on. There are some skills that at least one person needs, like Master Chef and Javlin that not everyone needs right away. Javlin allow a person to make a spear, which is very handy in melee combat. With one person being able to make them, others can spend their skill points in other areas. Master Chef allows a perosn to make better food. Again, that person can share the food with others.
If doing a group, it may be best to decide who wants to explore and gather items and who wants to build/maintain a base. That may determine which skills people take early on.
Just some random thoughts.