The Community Foundation of Middle Tennessee has started a comprehensive events listing called NowPlayingNashville.com, and it has a section for visual arts
. So far it doesn't include a lot of the private galleries, but some are there, like Estel. I'd encourage everyone with a gallery or one-night event to submit. I'm not sure how useful this site will be--there are separate listings for each exhibit at some of the major venues (including a separate listing for the George Rickey sculpture at the Frist, and items for each artist showing at the airport), but there is a search function that I haven't checked out yet. Whatever. Everyone might as well take advantage of this.