4
<EDITED>
Sorry for the misunderstanding, yes, this is a yellow-pages module... but it appears that the guide module is built on top of it...
For instance, see:
http://www.folsomliving.com/modules/xdirectory/viewcat.php?cid=45
http://www.folsomliving.com/modules/guide/viewcat.php?cid=45
They're definetely using the same db tables, almost precisely the same template, and (again) almost precisely the same php.
In other words, this looks like a specialized hack to the xdirectory module.
Cheers,
Keith