Thing 10: Introduction to SharePoint

I was able to upload a document from my files and also create a new document for the 23 Things SharePoint site.  I understand we can set up a SharePoint site for intranet users.  Could we set up a SharePoint site for a target outreach audience, let's say, teachers of English?  It seems SharePoint is more sophisticated than Google docs as you mentioned, Karen.  However, to share documents with Fulbright folks, for example, Google docs is still my only option - is that correct?