They acquired Fast in April 2008, and web parts have been available on codeplex since June last year. I saw a demo from Microsoft of the ESP technology in Gitex, Dubai last October, and it was pretty impressive stuff.. Fast ESP powers Search on sites like FT.com. The Fast Portal demonstrated was SharePoint based, and provided powerful search results, with document preview panes, faceted and federated search, plus clever 'suggestions' as part of the results.
There will now be four options available for Microsoft Enterprise Search:
- Search Server Express 2008
- Search Server 2008
- Microsoft Office SharePoint Server 2007
- Fast ESP
You can get more info regarding specific features here
Aj.. ;o)