Here are some resources to review as you move forward. Our own checklist of how to get up and running successfully. JAWS Just Add Water , available from Adobe, was the bible of MUG operations for years. While some of the information is dated, the basic concepts are still valuable. This goes beyond the scope of just starting a group, and is geared to the PC crowd, but that doesn't mean it isn't an excellent resource.
Apple lists it on their web site.
This check list will help you take your group from just a small group of friends who share a common interest into a more organized, more visible, more valuable organization. None of them are difficult, but all are highly beneficial. Don't try to do them all at once, but consider each one during your first year of operations. There are plenty of good reasons to start a MUG, and very few bad ones. But the one which is perhaps most important is that you have fun.