Microsoft Search Server 2008
Microsoft recently announced the release of a new search solution, based on SharePoint Products & Technologies called Microsoft Search Server 2008. On the Microsot Enterprise Search Team Blog, the search team unveils the latest product as a part of the SharePoint family that provides an optimized search solution for your organizations business data. There are two versions of this product, a full Server version and Search Server 2008 Express, which you can download now as a release candidate.
You can view a demo of Search Server Express here. The full version is not yet available, however, the featureset between Search Server 2008 and Search Server Express 2008 is very similar therefore allowing you to get a flavor of what the full server version will be like by evaluating the express edition.