cool app for Iphone

Did you know there is a cool App you can download for the iphone???  It will take all the garage sale postings in your area and create a map with dots to pinpoint the address!!  Now you just follow your iphone around on Garage Sale day!  No need to print them!!  You can also click on the ad and read what the person wrote on craigslist (as well as see pictures etc..).  It is SO cool!!!  Handy tool!  Now I just have to 'borrow' my hubbies iphone on GS day!