| Get ScrapeBox -- http://www.scrapebox.com
Get Yellow Pages Scraper - http://www.scrapebox.com/yellow-pages-scraper
Scrapebox allows you to build a custom test for testing proxies.
You can use this custom test to test proxies against any website that exists. You can use it to test proxies for advanced operators with google, test against yellow pages, test to see if Craigs List is blocking your IPs and any other site.
Its fairly straight forward you just need a url to load and a string to search for and the tester does the rest. Bear in mind that the tester is seen as a browser so you dont' want to just test your ips over and over and over.
Also note that you need to do this with javascript turned off and it also assumes that you don't need to be logged in to the site in order to see the string that your using. So test against publicly viewable pages. | 
