We've just got one here. It sucks. It really shows that PageRank is the secret sauce that makes Google work. Without PageRank, all you have is an unsorted list of documents that contain the keyword. Worse than useless.
So, let's say that you are looking for the design documents for a piece of code. Let's call it Foo. You search for Foo, figuring that the design documents would be considered important and at least listed on the first page.
First page is full of release notes for patches that delivered Foo. Then you get test exit reports. Then the list of audit reports showing the customers that have it installed.
This is undoubtedly because it is sorting based on date, and the dates on these files are newer than the ones on the word document. However, release notes have no real importance unless you are searching for them specifically. Same goes for test exit reports. They are both write-once documents. Even the audits are easier to find elsewhere.
I never did find the design document for it. The first architectural document that might even be related was on page 2. It was a 5 page .pdf of diagrams.
Anyways, it just re-affirms my opinions. Google with PageRank? Good. Google Appliance? Terrible.