In my feed from SharePointPedia, I came across a post from Bill Gates on how he uses Office 2007 and SharePoint. Yes, it is a pretty fluffy post about how wonderful Office 2007 is to use.
Mr. Gates points out the ability to use SharePoint as an expertise locater. He also talks about creating internal websites, collaboration and discussions in SharePoint, but never uses the terms "blog" or "wiki" or "RSS." I find it interesting that he is playing up the social networking features of SharePoint.
In a related note, Mr. Gates talks about using email and outlook as his primary communications tool. Again, he leaves out blogs, wikis and RSS.