Google's Search Appliance
An anonymous reader noted that Google is working on a Search Engine
that you can install behind your corporate firewall for indexing
your internal documents. It's a bit thin on information, but it
looks like for as little (cough) as $20k, you can have your own
google box. Not for everyone obviously ;)
Companies such as Cisco and the likes with a huge intranet, have been using Google for some time. Use the search engine on their main page to get the idea.
To me, it was only a matter of time until they port their technology to simpler environments (home users & smaller corporations) for a fraction of the cost.
(incidentally I searched for porn and still got 4 results back :)