Clustered search results for .net app on Win '03 / '08

i'm building a .net app using ASP.net 3.5 on win '03 or '08 (not sure yet) using SQL Server 2008.

A major part of the app is building a powerful search function which has to cluster search results similar to this site.

e.g. search for blindness and you see a cluster of results for blindness but also for visually impaired, eye etc.

I'm looking for recommendations for approaches working with off the she开发者_如何学Golf indexing technology on windows server 2003/2008 (preferably open source).

I've looked at:

Carrot2 - http://search.carrot2.org/stable/search

which looks very powerful but seems to rely on other indexes like Lucene and Solr.

Has anyone any experience working with these technologies on a windows platform? Do they play nicely with IIS?

Many thanks for any assistance.

Ed

There is a c# port of lucene (called lucene.NET) which works perfectly on windows (as you would expect, since it's using .NET).