What would probably easiest would be to keep the Just Announced board and people can choose to watch the board and be alerted every time a new topic (concert listing) is added. This is what I've done and it's very convenient to get an email about new shows.
Jaxxmin, I know that that board is supposed to only be temporary until the Just Announced! section is back up, but maybe instead you can keep it and have it as a supplement. It can be open for the public to post, so people can say "hell ya, they were awesome at the blah blah blah show in November '07..." a good way to generate buzz and get the community involved.
With the original post you can have a link to the Just Announced! section and maybe some myspace pages of the artists and reviews of past shows from the band (when applicable). Or if you feel like this isn't worth it, you can completely hand the section off to the members. When someone sees a new listing, they can start a new topic and let others know. Although, that may get a little cluttered and could result in redundant postings.
I'm glad you liked my idea and went with it

Thanks