I have the iPhone app, which lets you pick and choose what areas you want to search, and save your search areas. Then, when you search, you can view the results in map mode. You can save results, save searches, email straight from your phone, etc. It also puts a time stamp next to each listing so you can tell how long it's been up, and marks the listings you've viewed so you don't waste time looking at the same listings multiple times when scrolling through a big list. Best $0.99 I have spent in a while. It's been a big help.