Search Community Toolkit on Codeplex
Richard Riley (3x to your xbox racing wheel:)) announced the new Community Toolkit project on Codeplex, which gives you a list of opensource enhancement for Search Server 2008 and SharePoint 2007.
Yes, Smart Search, Search as you type, Faceted Search, Search Admin... are all there. And there're two new additions: Search Asp.net Server Controls for your asp.net applications, and Search Center Branding Tool which can kick the boring sharepoint interface into hell by just a few modification:)
It's time to try for yourself!