Microsoft recently released a new Silverlight 4 based facebook client for both Windows and Mac OS X. Scott Guthrie originally demonstrated this Silverlight client for Facebook during his PDC 2009 keynote late last year.

For more information, visit MicrosoftFeed article.

Based on customer requests for more robust compliance features, Microsoft has improved the validation capabilities of lists and libraries. Validation is now supported at both list and item levels.

For instance, a list owner can configure a validation to disallow the start date of an event item (stored in one column) to be after the end date of the event (stored in another column). If a user enters a start date that is later than the specified end date they will be presented with an error message when he or she attempts to save the item.

In another example, people can specify a column in a list as unique so that a contact list may not contain two entries with the same email address.

The activity feed in SharePoint 2010 is very interesting. It is a way to see and read what your co-workers are doing. Most of your actions in SP2010 will end up in the activity feed.

But what about your actions and updates outside the organisation? Like twitter?

Stef van Hooijdonk created a class that will import your twitter updates ( through your public timeline rss feed ) and will post those updates to your activityfeed. Form more information and download; click here...

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

Sites – The basic capabilities required to use SharePoint sites to engage employees, partners and customers in en effective manner, both inside and outside the firewall.

Communities – The ability to easily access expertise and interact with other people in new and creative ways across the enterprise through both formal and informal networks.

Content – The facilities for the creation, review, publication and disposal of content while conforming to defined compliance rules, whether the content exists as traditional documents or as Web pages. SharePoint 2010’s content-management capabilities include document management, records management, and Web-content management.

Search – With more content existing online and involving the collaboration of multiple participants, it is critical that people can quickly and easily locate relevant content across SharePoint lists, sites and external systems and data sources, such as file shares, Web sites or line-of-business applications.

Insights – Information workers need the ability to not only rapidly deliver and share information that is critical to the success of the business but also to turn raw data into actionable conclusions and to drive business results through sharing data-driven analysis.

Composites – Business users of all roles need the ability to quickly create customized solutions without involving corporate IT in each request. At the same time, the IT staff needs the capability to empower business users to create these applications while ensuring the environment’s stability and availability.

1) The first example is a custom field type that you can add to any document library and that returns the main properties of any document by
clicking on it in a fast and user-friendly way. Thanks to the jQuery code embedded in the CAML of the custom field type, the properties are returned via an AJAX query that calls lists.asmx to get the properties. 
This example is the main topic of the video and is rebuilt from scratch.

2). The secund example will be available for download and is overviewed during the video. It's a custom SharePoint calendar where users can type locations in a textbox. All the matching events are highlighted within the calendar directly (they blink) and direct links to the events are shown above the input textbox. 

Again, same principle than for the first example (query to lists.asmx) but this time the jQuery code is isolated in a separate JS file and both the jquery javascript file and the custom one are included OnPreRender of the custom calendar control.

To watch this video, click here.

jQuery is a fast and concise JavaScript Library that simplifies HTML document traversing, event handling, animating, and Ajax interactions for rapid web development (wikipedia article). It was created by John Resig and dual licensed under the MIT License and the GNU General Public License, jQuery is free and open source software.

Marc D. Anderson developed a jQuery library names "jQuery Library for SharePoint Web Services" which abstracts SharePoint's Web Services and makes them easier to use. It also includes functions which use the various Web Service operations to provide more useful (and cool) capabilities. It works entirely client side and requires no server install.

You can download it or you can read blog posts about this project(on Marc D. Anderson's blog)

• The hardware and software must meet or exceed the minimum system requirements to run the new version.
  This includes the requirement for 64-bit hardware and 64-bit versions of the operating system and Microsoft SQL Server. For more information about minimum requirements click here

• Office SharePoint Server 2007 must be updated to Service Pack 2
  Your environment must be updated to at least Service Pack 2 of Office SharePoint Server 2007 to run the upgrade process, either for an in-place or database attach upgrade.