Permanent site redirects using IIS are useful when moving a site to a new domain and also more search engine friendly than simply doing a javascript or server side redirect. These send a “301” response status code

To do this in IIS 6, simply open the website properties in IIS 6, select “a redirection to a URL” and enter the URL.

(courtesy of R. prestol)

To send querystring values along with your redirect, simply add “$Q” to the end of the URL, such as:

http://www.google.com/pagename/pagename/$Q

If you would like instructions on how to perform this via IIS 7, let me know and I can upload these screenshots as well.

References
http://en.wikipedia.org/wiki/HTTP_301