SharePoint 2010 - Search New features


1. Refined results - We can filter the search result using the filters in the left hand side.
2. Shared folders and public folders - We can search the files in the network shared drives, folders etc
3. Icon to search windows search - Integrated with Windows search and search local files also.
4. View in browser - Link to view some files in browser rather than in client application (eg. docx files.)
5. Wild card and boolean seach keywords.
    Eg : "Bala* NOT Krishnan"
    Eg : "PeopleSearchResult.aspx?k=firstname:balakrishnan%20lastname:ganesan"
6. New Custom Ranking Models allow you to change the weights that are used by SharePoint Search to rank
    results. Custom Ranking Models are used in conjunction with the Core Results web part.
7. SharePoint 2010 has capability to integrate FAST Search Server 2010 seamlessly.
8. SharePoint 2010 supports wildcard search.
9. Suggestions while typing search queries.
10. Improved "did you mean" suggestions togethor with suggestions for related searches.

11. Scale out the number of crawl/indexer components by adding additional servers to the farm and configuring them as crawlers which enables to increase crawl frequency, volume, and performance by distributing the crawl load among several servers, along with providing indexer redundancy if a server fails
12. Phonetic name matching and nickname matching - Users can search for a person by name without knowing the exact spelling of the name. For example, the search query "John Steal" could yield "John Steele" in the search results; results for the search query "Jeff" include names that contain "Geoff." In addition, nickname matching makes it possible for a search query for "Bill" to yield results that include "William."

Other Sharepoint 2010 new features please check the below links.

http://www.etechplanet.com/blog/sharepoint-2010-explore-new-features-and-enhancements-part1.aspx
http://www.etechplanet.com/blog/sharepoint-2010-explore-new-features-and-enhancements-part2.aspx
http://www.etechplanet.com/blog/new-features-and-enhancements-in-sharepoint-2010-part3.aspx