For a while now, WSN has had an option to add new listings to a category by using a google search for a given term. Unfortunately this isn't officially supported by google so runs the risk of getting your server blocked. The solution? The bing search API.

WSN 10.0.2 Beta 2 introduces the option to add listings from a bing search, using any of their dozens of country/language locales and the search term of your choice. To use this you'll have to sign up for an API key, but the good news is it's free for the first 5000 searches per month and you're unlikely to need more than that.

In the future, I could use bing's spatial API to allow adding results from a particular city. There may be a way to fetch addresses also. News searches by categories are also an option. Let me know if you're interested in any of these possibilities.