Well, I was about to get some sleep when I saw this post

http://blogs.atlassian.com/news/2007/02/sharepoint_is_s.html

And just had to reply with

"This is so wrong. Unless your are referring to the old version of SharePoint because the current version includes blog's and wiki's and has user editable profiles (My Site) along with colleague tracker and 'how I relate' to someone else based on organization hierarchy and distribution groups we both belong to.

Tagging is a core feature in SharePoint. In fact the lists containing the tag values can be used to tag the wiki's, blog's, documents, web pages, appointments, tasks, issues etc. So when you search (oh yea, it searches not only all the stuff in SharePoint, but almost anything else you point it at).

Yep, it's an integrated platform, not another island!"