The folks over at Chicago Tourfilter are doing some great work that deserves recognition. The idea behind the site is something that I had once attempted to put together, but failed miserably. In a nutshell, its a pretty comprehensive list of upcoming shows at just about every Chicago venue worth mentioning. You can search for bands using a pretty slick user interface (w00t AJAX), and even register for an account where you can type in band names you would like to stay informed about. When the Tourfilter database picks up that band coming to town, you get a nice email reminder telling you the details of the show. I created an account last week and put in a few bands, and everything worked swimmingly. Now, you have no excuse to claim ''I didn't know!' when your favorite band comes to town. Check it out!