Good to see this thread up! I'm just browsing for Sings next week while we're pottering around Lake District after Shrewsbury FF & before Wallingford Bunkfest. I've had a short glance at the FolkMap site (which I found a bit unwieldy when browsing) but agree that these online listings are only as good as the info that we (the Folk Enthusiasts) supply. It's up to us to keep these resources up to date!