Maybe a FAQ is in order, if we don't have one already. I could help out where I can, time permitting (read: not for at least a week or two!!)
Why is the feed down?
Why isn't my favorite airport on here?
Why can't I understand what they're saying?
How come I only hear planes?
Why do you scan so many frequencies on one feed?
How do I set up a feed?
Where do I go for more info on the ATC system?
I'm sure nobody is trying to be rude by asking about why the volunteer feeds are sometimes offline. In fact, it's a testament to how well this site works that people are surprised when a popular feed goes down!