It allows companies to build knowledge portals for their organizations. It provides building blocks in the form of wikis, forums, and knowledgebases to achieve

It allows companies to build knowledge portals for their organizations. It provides building blocks in the form of wikis, forums, and knowledgebases to achieve this goal. If you've ever used Community Server you'd find Sharepoint very similar. I believe it also includes document repositories, collaboration, and syncing, and is tightly integrated with the Office suite. Its clunkly and Microsoftish to be sure, but its here, it works, and its been deployed across many huge organizations. Implementing a knowledge portal is often a culture and process problem more than a software problem, and its here that Microsoft has excelled with Sharepoint. Its easy to write off to be sure, being made by MS and decidely "1.0", but this is the big brand alternative to collaboration tools like Dropbox, Etherpad, and yes, Google Wave.