Yo geniuses, this is more than two simple frames. It's not what affbuzz does. Affbuzz is just a frame for their own site, then a frame for the blog. Reachlocal is a frame for reachlocal, then a frame for cascadedental.reachlocal.com (aka reachlocal owned content). cascadedental.reachlocal.com is the reverse proxy, which literally just grabs the content and outputs it to the user. Note: these will show up as hits for the owners of the cascadedentalsite, but they will all be hits from the IP address of reachlocal's reverse proxy server.
Also, although there are all sorts of semi complicated ways to make strong reverse proxies (squid is commonly used - look it up), the most basic one you can do is a simple:
Code:
<?php echo file_get_contents('http://www.google.com'); ?>
Reading:
Reverse proxy - Wikipedia, the free encyclopedia