A great synopsis of where search is heading in the SharePoint 2010 timeframe from MS Search team blog!!!
There are two main enterprise search options coming with the SharePoint 2010 release:
1) SharePoint Server 2010 Search – the out-of-the-box SharePoint search for enterprise deployments.
2) FAST Search Server 2010 for SharePoint – a brand new add-on product based on the FAST search technology that combines the best of FAST’s high-end search capabilities with the best of SharePoint.
FAST Search for SharePoint 2010 adds a whole new level of search capabilities that are a superset of what comes in the out-of-the-box SharePoint 2010 Search option. Since there are now two search options in 2010, it’s useful to understand what is unique in FAST Search for SharePoint and when you might consider using it over the out-of-the-box SharePoint 2010 search. With that in mind, here are my 10 reasons to consider FAST Search for SharePoint 2010: