MOSS Faceted Search is a set of web parts that provide intuitive way to refine search results by category (facet). 

The facets are implemented using SharePoint API and stored within native SharePoint METADATA store. The solution demonstrates following key features:

• Grouping search results by facet
• Displaying a total number of hits per facet value
• Refining search results by facet value
• Update of the facet menu based on refined search criteria
• Displaying of the search criteria in a Bread Crumbs
• Ability to exclude the chosen facet from the search criteria
• Flexibility of the Faceted search configuration and its consistency with MOSS administration

 

For more information go to the project site

Error : "Access is denied. Verify that either the Default Content Access Account has access to this repository, or add a crawl rule to crawl this repository. If the repository being crawled is a SharePoint repository, verify that the account you are using has "Full Read" permissions on the SharePoint Web Application being crawled. (The item was deleted because it was either not found or the crawler was denied access to it.)"

Solution :

• Click Start, click Run, type regedit, and then click OK.
• In Registry Editor, locate and then click the following registry key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa
• Right-click Lsa, point to New, and then click DWORD Value.
• Type DisableLoopbackCheck, and then press ENTER.
• Right-click DisableLoopbackCheck, and then click Modify.
• In the Value data box, type 1, and then click OK.
• Quit Registry Editor, and then restart your computer.

Sometimes Office Sharepoint Server Search service is hanged it is showing in "starting" state there is no stop,start or restart option in services.msc console. You can restart your server, but problem still continue.

You can try the following stsadm commands to fix it.

stsadm -o osearch -action start 
stsadm -o osearch -action stop
net stop oSearch
net start oSearch

But sometimes problem still continue too, then try this command

psconfig -cmd services -install

Feature	SharePoint Foundation 2010	Search Server 2010 Express	Search Server 2010	SharePoint Server 2010	FAST Search Server 2010 for SharePoint
Basic search	ü	ü	ü	ü	ü
Visual Best Bets Keyword terms and synonyms defined by an administrator to enhance search results. For FAST Search Server 2010 for SharePoint only, a section of relevant information is displayed in addition to search results for a keyword term (for example, an image banner or HTML).		Limited	Limited	Limited	ü
Scopes Users can filter search results by using scopes.		ü	ü	ü	ü
Search enhancements based on user context Scopes Best Bets, visual Best Bets, and document promotions and demotions to a sub-group of employees.					ü
Custom properties Manage which properties are indexed and how these are treated in search results.		ü	ü	ü	ü
Property extraction Extracts key information (people names, locations, company names) from unstructured text to use as additional managed properties. (Limited: title, author, and date only.)		Limited	Limited	Limited	ü
Query federation Federates results from multiple search sources.		ü	ü	ü	ü
Query suggestions Provides help with query formulation based on what the user types.		ü	ü	ü	ü
Similar results Generates a new search based on the selected search result.					ü
Sort results on managed properties or rank profiles Sort results based on selected managed properties or by FAST Query Language (FQL) formula.					ü
Relevancy tuning by document or site promotions Promote selected documents or sites as highly relevant results for a keyword. Demote documents or sites to give lower rank. (Limited: promote documents for a given site, not query specific.)		Limited	Limited	Limited	ü
Shallow results refinement Refine results using metadata associated with the top results.		ü	ü	ü	ü
Deep results refinement Refine results using metadata associated with all results.					ü
Previewers Display inline previews of Word, PowerPoint, and Excel files.					ü
Windows 7 federation Enterprise search results are available in Windows desktop search.		ü	ü	ü	ü
People search Search users to find people by name or expertise.				ü	ü
Social search Relevancy is improved by how people interact and relate with content by factoring in social tagging and the relationship of people to content and other people.				ü	ü
Taxonomy integration Takes advantage of user generated tags. Managed taxonomy influences search rankings and experience.				ü	ü
Multi-tenant hosting Data partitioning of crawled data based on tenants.				ü
Rich Web indexing support Indexing of wide variety of Web content, including Flash.					ü

More details there http://technet.microsoft.com/en-au/sharepoint/ee518643.aspx

In Sharepoint 2010 Search Settings>Content Sources screen you can see new types of Content Sources that allows you to define different content sources.

- Sharepoint Sites
- Web Sites
- File Shares
- Exchange Public Folders
- Line of Business Data
- Custom Repository

Line of Business Data requires Business Connectivity Service application definition and Custom Repository requires custom content source adapter for content.

Microsoft describes techniques to create Microsoft Office SharePoint Server 2007 Web content management (WCM) sites that are optimized for search engines, and what to avoid to help improve search ratings.

"Search engine optimization is the process of optimizing sites and pages for search engines to result in better relevance and ranking for the site. The standard best practices or rules for search engine optimization that you might apply for Web pages are equally relevant and important for Web content management (WCM) sites you develop in Microsoft Office SharePoint Server 2007. A page or site that is not optimized properly for search engines can appear much lower is the search results or have lower rank, which can result in loss of traffic to the site. A site or page that is better optimized for search engines appears higher in the search results and will help increase traffic to your site."

If you want to read full article, use this link