GetListed.org is a cool free tool I have been using for many of my Local SEO campaigns. GetListed has been around for a year or so now, but they recently upgraded their local dashboard to track many more local listing indexes. They currently will track your business addresses on Google Places, Yahoo Local, Bing Local, Yelp, BOTW, and HotFrog.
If you have multiple business addresses, this tool can be invaluable for keeping track of your local SEO efforts. Check out this screen shot of the dashboard:





