I just stumbled into a cool new online site dedicated to promoting events. It's called "Upcoming.com" (http://upcoming.yahoo.com/). I haven't used it yet, but it looks like a great place to look for events as well as promote events online. The best part is that it's free.
Play around with it. Try entering some different searches into the "find events" search box. I could find any "Native American Flute" events, but hopefully (with a little word of mouth marketing like this) more things will appear. I am going to submit some of the NCFC events and see how it works. If you have a local flute circle, are a recording artist or are organizing any event, be sure to post it there.
Post a comment of what you think about this (or other similar) event marketing resource.