RodeWorks

Here is post with a boat-load of 3rd party app/plug-ins that work with SharePoint, allowing all sorts of social networking types of activities. Here is one example from from on my favorite companies, NewsGator: ” Social Sites 2.0 — This tool brings new social capabilities to SharePoint Server 2007
including community pages, which are ad hoc communities formed around
projects, interests, or locations, and social networking capabilities
that let employees better collaborate and share knowledge.”

SharePoint To Run Enterprise 2.0? - ReadWriteWeb

For many companies, SharePoint is the portal for all their business data - and not just docs, spreadsheets, presentations, and PDFs, but also browser-based forms that interact with built-in workflow technologies which add business logic to sophisticated online applications.

Other tools allow for the addition of business intelligence enabled dashboards and reporting centers, enterprise search, and application templates that can be downloaded and customized to quickly set up internal web sites and services that provide everything from online help desks, to groupboard workspaces, to knowledge libraries, vacation scheduling tools, project tracking workspaces, sales pipelines, and much more.