We are currently trialing a swicki to our website. It is hidden in resources section (we will move it if it is popular). Swickis are custom search portals developed around a topic that "learn" from a community, bought to you by the smart guys at Eurekster.
As an example if you type "prototype" into google you get:
However if you enter it into the data warehouse search swicki you get:
As you can see data warehouse pages are to the fore.
We have only just put this up so it has yet to have any "community" input - although if you can read the screenshots you can see I couldn't resist bumping the WhereScape results up a bit.
The results will get better and better the more it is used and the more people vote so...happy searching.