Kate,
Scott, the board's admin, recently re-did the page and that link appears to have disappeared. Maybe he'll chime in to let us know if it is or isn't returning.

But yes, you can still use the same function by going to google, and then searching using the appropriate method.
For example:
celiac site:www.glutenfreeforum.com
Its a great tool---should be the same as through the link.