Search Engine Placement Calculator

We are looking for a script that can be installed on a server and accessed through a browser that will determine where a given website ranks in each of the major search engines for a defined search term. For example, a user would enter a domain(s) such as [login to view URL] and the search terms "widget," "blue widget," and "small widget" and would specify the search engines (Google, MSN, Yahoo) that it wants results from. The script would search each of the requested engines and find out where the site ranks for the search term. I have examples of sites that do some of this. It should also have the ability to email results on a daily or weekly basis. An attractive, intuitive user interface is a requirement.