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Thomas Maeder | thomasmaeder.com
This is the website of Thomas Maeder with a blog about Intranet, Digital Workplace, Digital Communication & Social Collaboration topics.
As the SharePoint 2010 social features are limited, either custom code or a 3rd party add-on is necessary. Here a nice post about Extending SharePoint 2010 Social Features with custom code.
In some cases the default settings for the refinement panel are not suitable. This is also true for the accuracy index which basically defines how many results are considered for the filter options in the refinement panel. Find out how the customize the accuracy index here:
http://www.sharepointanalysthq.com/2011/05/search-refinement-accuracy-index-in-sharepoint-2010/
The out of the box activity feed of SharePoint can be extended with custom activities. These activities will then also show up in the My Newsfeed on the My Site.
http://weshackett.com/2011/06/extending-the-activity-feed-with-enterprise-content/
MVP Yaroslav Pentsarskyy shows how to customize the SharePoint blog template and use it in a more microblogging similar manner.
http://sharepoint.microsoft.com/Blogs/GetThePoint/Lists/Posts/Post.aspx?ID=438