This is a PHP program that will be integrated into an existing website. We currently run on a dedicated server using PHP 5.3 and MySQL 5.
A user will type in keywords and it'll obtain an arbitrary, user-specified number of urls from search results from Google and Bing. Those urls would then be displayed to the user with an option to display just the domain names (filtered to show only unique domains).
We would also be using the ProxyMesh ( [url removed, login to view] ) service as a rotating, random proxy service (Unless you know of a better, faster, less expensive option).