Now this is a very cool tool. Wish I'd thought of it.
http://www.padmapper.com/
Just type in an address, or your neighborhood, or a city name -- and instantly see a Google map with a push-pin showing every "pad" for rent in the surrounding area. Click on a pin, see the actual ad from Craigslist or Apartments.com... play around with the filters to narrow your search.
Way cool.
Landlords might like this because it shows at a glance what you're competing with trying to rent your place out. Be competitive from the git-go by surveying your area first, then setting the rent. Etc. Many uses, I'm sure.