Audience by Skills or Interests on SharePoint 2010

I have noticed that you can now create audiences based on the terms people select for Skills or Interests in their profile. I have used this to show personalisation links on My Sites whenever anyone selects certain keywords.

For example, if you enter "SharePoint" either as an interest or a skill in your user profile, a link to the SharePoint Team Site will appear in the top navigation bar of your My Site pages.

You could obviously apply this to any number of pages, links and Web Parts across the site, using it as a sort of self-subscription mechanism for exposing content of a particular subject matter.